diff --git a/src/Core/Core.h b/src/Core/Core.h
index 5f218775..1a7a1611 100644
--- a/src/Core/Core.h
+++ b/src/Core/Core.h
@@ -15,6 +15,138 @@ namespace VeraCrypt
 {
 	extern auto_ptr <CoreBase> Core;
 	extern auto_ptr <CoreBase> CoreDirect;
+
+	class WaitThreadRoutine
+	{
+	public:
+		Exception* m_pException;
+		WaitThreadRoutine() : m_pException(NULL) {}
+		virtual ~WaitThreadRoutine() {if (m_pException) delete m_pException;}
+		bool HasException () { return m_pException != NULL;}
+		Exception* GetException () const { return m_pException;}
+		void Execute(void)
+		{
+			try
+			{
+				ExecutionCode();
+			}
+			catch(Exception& ex)
+			{
+				m_pException = ex.CloneNew();
+			}
+			catch(...)
+			{
+				m_pException = new UnknownException (SRC_POS);
+			}
+		}
+		virtual void ExecutionCode(void) = 0;
+	};
+
+	class MountThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		MountOptions& m_options;
+		shared_ptr <VolumeInfo> m_pVolume;
+		MountThreadRoutine(MountOptions &options) : m_options(options) {}
+		virtual ~MountThreadRoutine() { }
+		virtual void ExecutionCode(void) { m_pVolume = Core->MountVolume(m_options); }
+	};
+
+	class VolumeCreatorThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		shared_ptr <VolumeCreationOptions> m_options;
+		shared_ptr <VolumeCreator> m_pCreator;
+		VolumeCreatorThreadRoutine(shared_ptr <VolumeCreationOptions> options, shared_ptr <VolumeCreator> pCreator)
+			: m_options(options), m_pCreator(pCreator) {}
+		virtual ~VolumeCreatorThreadRoutine() { }
+		virtual void ExecutionCode(void) { m_pCreator->CreateVolume (m_options); }
+	};
+
+	class ChangePasswordThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		shared_ptr <VolumePath> m_volumePath;
+		bool m_preserveTimestamps;
+		shared_ptr <VolumePassword> m_password;
+		shared_ptr <Pkcs5Kdf> m_kdf;
+		shared_ptr <KeyfileList> m_keyfiles;
+		shared_ptr <VolumePassword> m_newPassword;
+		shared_ptr <KeyfileList> m_newKeyfiles;
+		shared_ptr <Pkcs5Kdf> m_newPkcs5Kdf;
+		int m_wipeCount;
+		ChangePasswordThreadRoutine(shared_ptr <VolumePath> volumePath, bool preserveTimestamps, shared_ptr <VolumePassword> password, shared_ptr <Pkcs5Kdf> kdf, shared_ptr <KeyfileList> keyfiles, shared_ptr <VolumePassword> newPassword, shared_ptr <KeyfileList> newKeyfiles, shared_ptr <Pkcs5Kdf> newPkcs5Kdf, int wipeCount) : m_volumePath(volumePath), m_preserveTimestamps(preserveTimestamps), m_password(password), m_kdf(kdf), m_keyfiles(keyfiles), m_newPassword(newPassword), m_newKeyfiles(newKeyfiles), m_newPkcs5Kdf(newPkcs5Kdf), m_wipeCount(wipeCount)  {}
+		virtual ~ChangePasswordThreadRoutine() { }
+		virtual void ExecutionCode(void) { Core->ChangePassword(m_volumePath, m_preserveTimestamps, m_password, m_kdf, m_keyfiles, m_newPassword, m_newKeyfiles, m_newPkcs5Kdf, m_wipeCount); }
+	};
+
+	class OpenVolumeThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		shared_ptr <VolumePath> m_volumePath;
+		bool m_preserveTimestamps;
+		shared_ptr <VolumePassword> m_password;
+		shared_ptr<Pkcs5Kdf> m_Kdf;
+		shared_ptr <KeyfileList> m_keyfiles;
+		VolumeProtection::Enum m_protection;
+		shared_ptr <VolumePassword> m_protectionPassword;
+		shared_ptr<Pkcs5Kdf> m_protectionKdf;
+		shared_ptr <KeyfileList> m_protectionKeyfiles;
+		bool m_sharedAccessAllowed;
+		VolumeType::Enum m_volumeType;
+		bool m_useBackupHeaders;
+		bool m_partitionInSystemEncryptionScope;
+		shared_ptr <Volume> m_pVolume;
+
+		OpenVolumeThreadRoutine(shared_ptr <VolumePath> volumePath, bool preserveTimestamps, shared_ptr <VolumePassword> password, shared_ptr<Pkcs5Kdf> Kdf, shared_ptr <KeyfileList> keyfiles, VolumeProtection::Enum protection = VolumeProtection::None, shared_ptr <VolumePassword> protectionPassword = shared_ptr <VolumePassword> (), shared_ptr<Pkcs5Kdf> protectionKdf = shared_ptr<Pkcs5Kdf> (), shared_ptr <KeyfileList> protectionKeyfiles = shared_ptr <KeyfileList> (), bool sharedAccessAllowed = false, VolumeType::Enum volumeType = VolumeType::Unknown, bool useBackupHeaders = false, bool partitionInSystemEncryptionScope = false):
+		m_volumePath(volumePath), m_preserveTimestamps(preserveTimestamps), m_password(password), m_Kdf(Kdf), m_keyfiles(keyfiles),
+		m_protection(protection), m_protectionPassword(protectionPassword), m_protectionKdf(protectionKdf), m_protectionKeyfiles(protectionKeyfiles), m_sharedAccessAllowed(sharedAccessAllowed), m_volumeType(volumeType),m_useBackupHeaders(useBackupHeaders),
+		m_partitionInSystemEncryptionScope(partitionInSystemEncryptionScope) {}
+
+		~OpenVolumeThreadRoutine() {}
+
+		virtual void ExecutionCode(void) { m_pVolume = Core->OpenVolume(m_volumePath,m_preserveTimestamps,m_password,m_Kdf,m_keyfiles, m_protection,m_protectionPassword,m_protectionKdf, m_protectionKeyfiles,m_sharedAccessAllowed,m_volumeType,m_useBackupHeaders, m_partitionInSystemEncryptionScope); }
+
+	};
+
+	class ReEncryptHeaderThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		const BufferPtr &m_newHeaderBuffer;
+		shared_ptr <VolumeHeader> m_header;
+		shared_ptr <VolumePassword> m_password;
+		shared_ptr <KeyfileList> m_keyfiles;
+		ReEncryptHeaderThreadRoutine(const BufferPtr &newHeaderBuffer, shared_ptr <VolumeHeader> header, shared_ptr <VolumePassword> password, shared_ptr <KeyfileList> keyfiles)
+			: m_newHeaderBuffer(newHeaderBuffer), m_header(header), m_password(password), m_keyfiles(keyfiles) {}
+		virtual ~ReEncryptHeaderThreadRoutine() { }
+		virtual void ExecutionCode(void) { Core->ReEncryptVolumeHeaderWithNewSalt (m_newHeaderBuffer, m_header, m_password, m_keyfiles); }
+	};
+
+	class DecryptThreadRoutine : public WaitThreadRoutine
+	{
+	public:
+		shared_ptr <VolumeHeader> m_pHeader;
+		const ConstBufferPtr &m_encryptedData;
+		const VolumePassword &m_password;
+		shared_ptr <Pkcs5Kdf> m_kdf;
+		const Pkcs5KdfList &m_keyDerivationFunctions;
+		const EncryptionAlgorithmList &m_encryptionAlgorithms;
+		const EncryptionModeList &m_encryptionModes;
+		bool m_bResult;
+		DecryptThreadRoutine(shared_ptr <VolumeHeader> header, const ConstBufferPtr &encryptedData, const VolumePassword &password, shared_ptr <Pkcs5Kdf> kdf, const Pkcs5KdfList &keyDerivationFunctions, const EncryptionAlgorithmList &encryptionAlgorithms, const EncryptionModeList &encryptionModes)
+			: m_pHeader(header), m_encryptedData(encryptedData), m_password(password), m_kdf(kdf), m_keyDerivationFunctions(keyDerivationFunctions), m_encryptionAlgorithms(encryptionAlgorithms), m_encryptionModes(encryptionModes), m_bResult(false){}
+		virtual ~DecryptThreadRoutine() { }
+		virtual void ExecutionCode(void) { m_bResult = m_pHeader->Decrypt(m_encryptedData, m_password, m_kdf, m_keyDerivationFunctions, m_encryptionAlgorithms, m_encryptionModes); }
+	};
+
+	class WaitThreadUI
+	{
+	public:
+		WaitThreadUI(WaitThreadRoutine* pRoutine): m_pRoutine(pRoutine) {}
+		virtual ~WaitThreadUI() {}
+		virtual void Run(void) { m_pRoutine->ExecutionCode();} 
+		WaitThreadRoutine* m_pRoutine;
+	};
 }
 
 #endif // TC_HEADER_Core_Core
diff --git a/src/Core/CoreBase.h b/src/Core/CoreBase.h
index 0d52e5b9..d7dbcd0e 100755
--- a/src/Core/CoreBase.h
+++ b/src/Core/CoreBase.h
@@ -20,6 +20,7 @@
 #include "CoreException.h"
 #include "HostDevice.h"
 #include "MountOptions.h"
+#include "VolumeCreator.h"
 
 namespace VeraCrypt
 {
diff --git a/src/Main/Forms/ChangePasswordDialog.cpp b/src/Main/Forms/ChangePasswordDialog.cpp
index e07b7d3b..75fe717c 100755
--- a/src/Main/Forms/ChangePasswordDialog.cpp
+++ b/src/Main/Forms/ChangePasswordDialog.cpp
@@ -10,6 +10,7 @@
 #include "Main/Main.h"
 #include "Main/GraphicUserInterface.h"
 #include "ChangePasswordDialog.h"
+#include "WaitDialog.h"
 
 namespace VeraCrypt
 {
@@ -124,9 +125,11 @@ namespace VeraCrypt
 				});
 #endif
 				wxBusyCursor busy;
-				Core->ChangePassword (Path,	Gui->GetPreferences().DefaultMountOptions.PreserveTimestamps,
+				ChangePasswordThreadRoutine routine(Path,	Gui->GetPreferences().DefaultMountOptions.PreserveTimestamps,
 					CurrentPasswordPanel->GetPassword(), CurrentPasswordPanel->GetPkcs5Kdf(), CurrentPasswordPanel->GetKeyfiles(),
 					newPassword, newKeyfiles, NewPasswordPanel->GetPkcs5Kdf(), NewPasswordPanel->GetHeaderWipeCount());
+				WaitDialog dlg(this, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+				dlg.Run();
 			}
 
 			switch (DialogMode)
diff --git a/src/Main/Forms/Forms.cpp b/src/Main/Forms/Forms.cpp
old mode 100644
new mode 100755
index ad732534..1c536b31
--- a/src/Main/Forms/Forms.cpp
+++ b/src/Main/Forms/Forms.cpp
@@ -3349,3 +3349,38 @@ VolumeSizeWizardPageBase::~VolumeSizeWizardPageBase()
 	VolumeSizePrefixChoice->Disconnect( wxEVT_COMMAND_CHOICE_SELECTED, wxCommandEventHandler( VolumeSizeWizardPageBase::OnVolumeSizePrefixSelected ), NULL, this );
 	
 }
+
+WaitDialogBase::WaitDialogBase( wxWindow* parent, wxWindowID id, const wxString& title, const wxPoint& pos, const wxSize& size, long style ) : wxDialog( parent, id, title, pos, size, style )
+{
+	this->SetSizeHints( wxDefaultSize, wxDefaultSize );
+	
+	wxBoxSizer* bSizer160;
+	bSizer160 = new wxBoxSizer( wxVERTICAL );
+	
+	WaitStaticText = new wxStaticText( this, wxID_ANY, _("MyLabel"), wxDefaultPosition, wxDefaultSize, wxALIGN_CENTRE );
+	WaitStaticText->Wrap( -1 );
+	bSizer160->Add( WaitStaticText, 0, wxALIGN_CENTER_HORIZONTAL|wxALL|wxEXPAND, 5 );
+	
+	WaitProgessBar = new wxGauge( this, wxID_ANY, 100, wxDefaultPosition, wxDefaultSize, wxGA_HORIZONTAL|wxGA_SMOOTH );
+	WaitProgessBar->SetValue( 0 ); 
+	bSizer160->Add( WaitProgessBar, 0, wxALL|wxEXPAND, 5 );
+	
+	
+	this->SetSizer( bSizer160 );
+	this->Layout();
+	bSizer160->Fit( this );
+	
+	this->Centre( wxBOTH );
+	
+	// Connect Events
+	this->Connect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( WaitDialogBase::OnWaitDialogClose ) );
+	this->Connect( wxEVT_INIT_DIALOG, wxInitDialogEventHandler( WaitDialogBase::OnWaitDialogInit ) );
+}
+
+WaitDialogBase::~WaitDialogBase()
+{
+	// Disconnect Events
+	this->Disconnect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( WaitDialogBase::OnWaitDialogClose ) );
+	this->Disconnect( wxEVT_INIT_DIALOG, wxInitDialogEventHandler( WaitDialogBase::OnWaitDialogInit ) );
+	
+}
diff --git a/src/Main/Forms/Forms.h b/src/Main/Forms/Forms.h
old mode 100644
new mode 100755
index a59a9bf7..b0579219
--- a/src/Main/Forms/Forms.h
+++ b/src/Main/Forms/Forms.h
@@ -1025,6 +1025,29 @@ namespace VeraCrypt
 		
 	};
 	
+	///////////////////////////////////////////////////////////////////////////////
+	/// Class WaitDialogBase
+	///////////////////////////////////////////////////////////////////////////////
+	class WaitDialogBase : public wxDialog 
+	{
+		private:
+		
+		protected:
+			wxStaticText* WaitStaticText;
+			wxGauge* WaitProgessBar;
+			
+			// Virtual event handlers, overide them in your derived class
+			virtual void OnWaitDialogClose( wxCloseEvent& event ) { event.Skip(); }
+			virtual void OnWaitDialogInit( wxInitDialogEvent& event ) { event.Skip(); }
+			
+		
+		public:
+			
+			WaitDialogBase( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = _("VeraCrypt"), const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxSize( -1,-1 ), long style = wxCAPTION ); 
+			~WaitDialogBase();
+		
+	};
+	
 } // namespace VeraCrypt
 
 #endif //__FORMS_H__
diff --git a/src/Main/Forms/MainFrame.cpp b/src/Main/Forms/MainFrame.cpp
index b48f3718..fbf20537 100644
--- a/src/Main/Forms/MainFrame.cpp
+++ b/src/Main/Forms/MainFrame.cpp
@@ -36,6 +36,10 @@
 
 namespace VeraCrypt
 {
+	DEFINE_EVENT_TYPE(wxEVT_COMMAND_UPDATE_VOLUME_LIST)
+	DEFINE_EVENT_TYPE(wxEVT_COMMAND_PREF_UPDATED)
+	DEFINE_EVENT_TYPE(wxEVT_COMMAND_OPEN_VOLUME_REQUEST)
+
 	MainFrame::MainFrame (wxWindow* parent) : MainFrameBase (parent),
 		ListItemRightClickEventPending (false),
 		SelectedItemIndex (-1),
@@ -84,6 +88,11 @@ namespace VeraCrypt
 				Gui->ShowError (e);
 			}
 		}
+
+		Connect( wxID_ANY, wxEVT_COMMAND_UPDATE_VOLUME_LIST, wxCommandEventHandler( MainFrame::OnUpdateVolumeList ) );
+		Connect( wxID_ANY, wxEVT_COMMAND_PREF_UPDATED, wxCommandEventHandler( MainFrame::OnPreferencesUpdated ) );
+		Connect( wxID_ANY, wxEVT_COMMAND_OPEN_VOLUME_REQUEST, wxCommandEventHandler( MainFrame::OnOpenVolumeSystemRequest ) );
+
 	}
 
 	MainFrame::~MainFrame ()
@@ -100,6 +109,9 @@ namespace VeraCrypt
 		}
 #endif
 
+		Disconnect( wxID_ANY, wxEVT_COMMAND_UPDATE_VOLUME_LIST, wxCommandEventHandler( MainFrame::OnUpdateVolumeList ) );
+		Disconnect( wxID_ANY, wxEVT_COMMAND_PREF_UPDATED, wxCommandEventHandler( MainFrame::OnPreferencesUpdated ) );
+		Disconnect( wxID_ANY, wxEVT_COMMAND_OPEN_VOLUME_REQUEST, wxCommandEventHandler( MainFrame::OnOpenVolumeSystemRequest ) );
 		Core->VolumeMountedEvent.Disconnect (this);
 		Core->VolumeDismountedEvent.Disconnect (this);
 		Gui->OpenVolumeSystemRequestEvent.Disconnect (this);
@@ -343,7 +355,7 @@ namespace VeraCrypt
 		Core->VolumeMountedEvent.Connect (EventConnector <MainFrame> (this, &MainFrame::OnVolumeMounted));
 		Core->VolumeDismountedEvent.Connect (EventConnector <MainFrame> (this, &MainFrame::OnVolumeDismounted));
 		Gui->OpenVolumeSystemRequestEvent.Connect (EventConnector <MainFrame> (this, &MainFrame::OnOpenVolumeSystemRequestEvent));
-		Gui->PreferencesUpdatedEvent.Connect (EventConnector <MainFrame> (this, &MainFrame::OnPreferencesUpdated));
+		Gui->PreferencesUpdatedEvent.Connect (EventConnector <MainFrame> (this, &MainFrame::OnPreferencesUpdatedEvent));
 
 		// Drag & drop
 		class FileDropTarget : public wxFileDropTarget
@@ -1139,7 +1151,22 @@ namespace VeraCrypt
 		dialog.ShowModal();
 	}
 
-	void MainFrame::OnPreferencesUpdated (EventArgs &args)
+	void MainFrame::OnOpenVolumeSystemRequest (wxCommandEvent& event)
+	{
+		wstring* eventPath = (wstring*) event.GetClientData();
+		SetVolumePath (*eventPath);
+		delete eventPath;
+	}
+
+	void MainFrame::OnOpenVolumeSystemRequestEvent (EventArgs &args)
+	{
+		wstring* eventPath = new wstring (dynamic_cast <OpenVolumeSystemRequestEventArgs &> (args).mVolumePath);
+		wxCommandEvent* pEvent = new wxCommandEvent( wxEVT_COMMAND_OPEN_VOLUME_REQUEST,0);
+		pEvent->SetClientData(eventPath);
+		wxQueueEvent (this, pEvent);
+	}
+
+	void MainFrame::OnPreferencesUpdated (wxCommandEvent& event)
 	{
 		const UserPreferences &prefs = GetPreferences();
 
diff --git a/src/Main/Forms/MainFrame.h b/src/Main/Forms/MainFrame.h
index a759cfcd..b31128cb 100644
--- a/src/Main/Forms/MainFrame.h
+++ b/src/Main/Forms/MainFrame.h
@@ -16,6 +16,10 @@ namespace VeraCrypt
 {
 	struct FavoriteVolume;
 
+	DECLARE_LOCAL_EVENT_TYPE(wxEVT_COMMAND_UPDATE_VOLUME_LIST, -1);
+	DECLARE_LOCAL_EVENT_TYPE(wxEVT_COMMAND_PREF_UPDATED, -1);
+	DECLARE_LOCAL_EVENT_TYPE(wxEVT_COMMAND_OPEN_VOLUME_REQUEST, -1);
+
 	class MainFrame : public MainFrameBase
 	{
 	public:
@@ -109,10 +113,12 @@ namespace VeraCrypt
 		void OnNoHistoryCheckBoxClick (wxCommandEvent& event);
 		void OnOnlineHelpMenuItemSelected (wxCommandEvent& event) { Gui->OpenOnlineHelp (this); }
 		void OnOpenVolumeMenuItemSelected (wxCommandEvent& event) { OpenSelectedVolume(); }
-		void OnOpenVolumeSystemRequestEvent (EventArgs &args) { SetVolumePath (wstring (dynamic_cast <OpenVolumeSystemRequestEventArgs &> (args).mVolumePath)); }
+		void OnOpenVolumeSystemRequest (wxCommandEvent& event);
+		void OnOpenVolumeSystemRequestEvent (EventArgs &args);
 		void OnOrganizeFavoritesMenuItemSelected (wxCommandEvent& event);
 		void OnPreferencesMenuItemSelected (wxCommandEvent& event);
-		void OnPreferencesUpdated (EventArgs &args);
+		void OnPreferencesUpdated (wxCommandEvent& event);
+		void OnPreferencesUpdatedEvent (EventArgs &args) { wxQueueEvent (this, new wxCommandEvent( wxEVT_COMMAND_PREF_UPDATED,0)); }
 		void OnRemoveKeyfilesMenuItemSelected (wxCommandEvent& event) { ChangePassword (ChangePasswordDialog::Mode::RemoveAllKeyfiles); }
 		void OnRepairFilesystemMenuItemSelected( wxCommandEvent& event ) { CheckFilesystem (true); }
 		void OnRestoreVolumeHeaderMenuItemSelected (wxCommandEvent& event);
@@ -126,8 +132,9 @@ namespace VeraCrypt
 		void OnVolumePropertiesButtonClick (wxCommandEvent& event);
 		void OnVolumeToolsButtonClick (wxCommandEvent& event);
 		void OnVolumeButtonClick (wxCommandEvent& event);
-		void OnVolumeDismounted (EventArgs &args) { UpdateVolumeList(); }
-		void OnVolumeMounted (EventArgs &args) { UpdateVolumeList(); }
+		void OnUpdateVolumeList (wxCommandEvent& event) { UpdateVolumeList(); }
+		void OnVolumeDismounted (EventArgs &args) { wxQueueEvent (this, new wxCommandEvent( wxEVT_COMMAND_UPDATE_VOLUME_LIST,0)); }
+		void OnVolumeMounted (EventArgs &args) { wxQueueEvent (this, new wxCommandEvent( wxEVT_COMMAND_UPDATE_VOLUME_LIST,0)); }
 		void OnUserGuideMenuItemSelected (wxCommandEvent& event) { Gui->OpenUserGuide (this); }
 		void OnWebsiteMenuItemSelected (wxCommandEvent& event) { Gui->OpenHomepageLink (this, L"website"); }
 		void OnWipeCacheButtonClick (wxCommandEvent& event);
diff --git a/src/Main/Forms/TrueCrypt.fbp b/src/Main/Forms/TrueCrypt.fbp
old mode 100644
new mode 100755
index 0e14502d..998b00d1
--- a/src/Main/Forms/TrueCrypt.fbp
+++ b/src/Main/Forms/TrueCrypt.fbp
@@ -26918,5 +26918,244 @@
                 </object>
             </object>
         </object>
+        <object class="Dialog" expanded="0">
+            <property name="aui_managed">0</property>
+            <property name="aui_manager_style">wxAUI_MGR_DEFAULT</property>
+            <property name="bg"></property>
+            <property name="center">wxBOTH</property>
+            <property name="context_help"></property>
+            <property name="context_menu">1</property>
+            <property name="enabled">1</property>
+            <property name="event_handler">impl_virtual</property>
+            <property name="extra_style"></property>
+            <property name="fg"></property>
+            <property name="font"></property>
+            <property name="hidden">0</property>
+            <property name="id">wxID_ANY</property>
+            <property name="maximum_size"></property>
+            <property name="minimum_size"></property>
+            <property name="name">WaitDialogBase</property>
+            <property name="pos"></property>
+            <property name="size">-1,-1</property>
+            <property name="style">wxCAPTION</property>
+            <property name="subclass"></property>
+            <property name="title">VeraCrypt</property>
+            <property name="tooltip"></property>
+            <property name="window_extra_style"></property>
+            <property name="window_name"></property>
+            <property name="window_style"></property>
+            <event name="OnActivate"></event>
+            <event name="OnActivateApp"></event>
+            <event name="OnAuiFindManager"></event>
+            <event name="OnAuiPaneButton"></event>
+            <event name="OnAuiPaneClose"></event>
+            <event name="OnAuiPaneMaximize"></event>
+            <event name="OnAuiPaneRestore"></event>
+            <event name="OnAuiRender"></event>
+            <event name="OnChar"></event>
+            <event name="OnClose">OnWaitDialogClose</event>
+            <event name="OnEnterWindow"></event>
+            <event name="OnEraseBackground"></event>
+            <event name="OnHibernate"></event>
+            <event name="OnIconize"></event>
+            <event name="OnIdle"></event>
+            <event name="OnInitDialog">OnWaitDialogInit</event>
+            <event name="OnKeyDown"></event>
+            <event name="OnKeyUp"></event>
+            <event name="OnKillFocus"></event>
+            <event name="OnLeaveWindow"></event>
+            <event name="OnLeftDClick"></event>
+            <event name="OnLeftDown"></event>
+            <event name="OnLeftUp"></event>
+            <event name="OnMiddleDClick"></event>
+            <event name="OnMiddleDown"></event>
+            <event name="OnMiddleUp"></event>
+            <event name="OnMotion"></event>
+            <event name="OnMouseEvents"></event>
+            <event name="OnMouseWheel"></event>
+            <event name="OnPaint"></event>
+            <event name="OnRightDClick"></event>
+            <event name="OnRightDown"></event>
+            <event name="OnRightUp"></event>
+            <event name="OnSetFocus"></event>
+            <event name="OnSize"></event>
+            <event name="OnUpdateUI"></event>
+            <object class="wxBoxSizer" expanded="0">
+                <property name="minimum_size"></property>
+                <property name="name">bSizer160</property>
+                <property name="orient">wxVERTICAL</property>
+                <property name="permission">none</property>
+                <object class="sizeritem" expanded="0">
+                    <property name="border">5</property>
+                    <property name="flag">wxALIGN_CENTER_HORIZONTAL|wxALL|wxEXPAND</property>
+                    <property name="proportion">0</property>
+                    <object class="wxStaticText" expanded="0">
+                        <property name="BottomDockable">1</property>
+                        <property name="LeftDockable">1</property>
+                        <property name="RightDockable">1</property>
+                        <property name="TopDockable">1</property>
+                        <property name="aui_layer"></property>
+                        <property name="aui_name"></property>
+                        <property name="aui_position"></property>
+                        <property name="aui_row"></property>
+                        <property name="best_size"></property>
+                        <property name="bg"></property>
+                        <property name="caption"></property>
+                        <property name="caption_visible">1</property>
+                        <property name="center_pane">0</property>
+                        <property name="close_button">1</property>
+                        <property name="context_help"></property>
+                        <property name="context_menu">1</property>
+                        <property name="default_pane">0</property>
+                        <property name="dock">Dock</property>
+                        <property name="dock_fixed">0</property>
+                        <property name="docking">Left</property>
+                        <property name="enabled">1</property>
+                        <property name="fg"></property>
+                        <property name="floatable">1</property>
+                        <property name="font"></property>
+                        <property name="gripper">0</property>
+                        <property name="hidden">0</property>
+                        <property name="id">wxID_ANY</property>
+                        <property name="label">MyLabel</property>
+                        <property name="max_size"></property>
+                        <property name="maximize_button">0</property>
+                        <property name="maximum_size"></property>
+                        <property name="min_size"></property>
+                        <property name="minimize_button">0</property>
+                        <property name="minimum_size"></property>
+                        <property name="moveable">1</property>
+                        <property name="name">WaitStaticText</property>
+                        <property name="pane_border">1</property>
+                        <property name="pane_position"></property>
+                        <property name="pane_size"></property>
+                        <property name="permission">protected</property>
+                        <property name="pin_button">1</property>
+                        <property name="pos"></property>
+                        <property name="resize">Resizable</property>
+                        <property name="show">1</property>
+                        <property name="size"></property>
+                        <property name="style">wxALIGN_CENTRE</property>
+                        <property name="subclass"></property>
+                        <property name="toolbar_pane">0</property>
+                        <property name="tooltip"></property>
+                        <property name="window_extra_style"></property>
+                        <property name="window_name"></property>
+                        <property name="window_style"></property>
+                        <property name="wrap">-1</property>
+                        <event name="OnChar"></event>
+                        <event name="OnEnterWindow"></event>
+                        <event name="OnEraseBackground"></event>
+                        <event name="OnKeyDown"></event>
+                        <event name="OnKeyUp"></event>
+                        <event name="OnKillFocus"></event>
+                        <event name="OnLeaveWindow"></event>
+                        <event name="OnLeftDClick"></event>
+                        <event name="OnLeftDown"></event>
+                        <event name="OnLeftUp"></event>
+                        <event name="OnMiddleDClick"></event>
+                        <event name="OnMiddleDown"></event>
+                        <event name="OnMiddleUp"></event>
+                        <event name="OnMotion"></event>
+                        <event name="OnMouseEvents"></event>
+                        <event name="OnMouseWheel"></event>
+                        <event name="OnPaint"></event>
+                        <event name="OnRightDClick"></event>
+                        <event name="OnRightDown"></event>
+                        <event name="OnRightUp"></event>
+                        <event name="OnSetFocus"></event>
+                        <event name="OnSize"></event>
+                        <event name="OnUpdateUI"></event>
+                    </object>
+                </object>
+                <object class="sizeritem" expanded="0">
+                    <property name="border">5</property>
+                    <property name="flag">wxALL|wxEXPAND</property>
+                    <property name="proportion">0</property>
+                    <object class="wxGauge" expanded="0">
+                        <property name="BottomDockable">1</property>
+                        <property name="LeftDockable">1</property>
+                        <property name="RightDockable">1</property>
+                        <property name="TopDockable">1</property>
+                        <property name="aui_layer"></property>
+                        <property name="aui_name"></property>
+                        <property name="aui_position"></property>
+                        <property name="aui_row"></property>
+                        <property name="best_size"></property>
+                        <property name="bg"></property>
+                        <property name="caption"></property>
+                        <property name="caption_visible">1</property>
+                        <property name="center_pane">0</property>
+                        <property name="close_button">1</property>
+                        <property name="context_help"></property>
+                        <property name="context_menu">1</property>
+                        <property name="default_pane">0</property>
+                        <property name="dock">Dock</property>
+                        <property name="dock_fixed">0</property>
+                        <property name="docking">Left</property>
+                        <property name="enabled">1</property>
+                        <property name="fg"></property>
+                        <property name="floatable">1</property>
+                        <property name="font"></property>
+                        <property name="gripper">0</property>
+                        <property name="hidden">0</property>
+                        <property name="id">wxID_ANY</property>
+                        <property name="max_size"></property>
+                        <property name="maximize_button">0</property>
+                        <property name="maximum_size"></property>
+                        <property name="min_size"></property>
+                        <property name="minimize_button">0</property>
+                        <property name="minimum_size"></property>
+                        <property name="moveable">1</property>
+                        <property name="name">WaitProgessBar</property>
+                        <property name="pane_border">1</property>
+                        <property name="pane_position"></property>
+                        <property name="pane_size"></property>
+                        <property name="permission">protected</property>
+                        <property name="pin_button">1</property>
+                        <property name="pos"></property>
+                        <property name="range">100</property>
+                        <property name="resize">Resizable</property>
+                        <property name="show">1</property>
+                        <property name="size"></property>
+                        <property name="style">wxGA_HORIZONTAL|wxGA_SMOOTH</property>
+                        <property name="subclass"></property>
+                        <property name="toolbar_pane">0</property>
+                        <property name="tooltip"></property>
+                        <property name="validator_data_type"></property>
+                        <property name="validator_style">wxFILTER_NONE</property>
+                        <property name="validator_type">wxDefaultValidator</property>
+                        <property name="validator_variable"></property>
+                        <property name="value">0</property>
+                        <property name="window_extra_style"></property>
+                        <property name="window_name"></property>
+                        <property name="window_style"></property>
+                        <event name="OnChar"></event>
+                        <event name="OnEnterWindow"></event>
+                        <event name="OnEraseBackground"></event>
+                        <event name="OnKeyDown"></event>
+                        <event name="OnKeyUp"></event>
+                        <event name="OnKillFocus"></event>
+                        <event name="OnLeaveWindow"></event>
+                        <event name="OnLeftDClick"></event>
+                        <event name="OnLeftDown"></event>
+                        <event name="OnLeftUp"></event>
+                        <event name="OnMiddleDClick"></event>
+                        <event name="OnMiddleDown"></event>
+                        <event name="OnMiddleUp"></event>
+                        <event name="OnMotion"></event>
+                        <event name="OnMouseEvents"></event>
+                        <event name="OnMouseWheel"></event>
+                        <event name="OnPaint"></event>
+                        <event name="OnRightDClick"></event>
+                        <event name="OnRightDown"></event>
+                        <event name="OnRightUp"></event>
+                        <event name="OnSetFocus"></event>
+                        <event name="OnSize"></event>
+                        <event name="OnUpdateUI"></event>
+                    </object>
+                </object>
+            </object>
+        </object>
     </object>
 </wxFormBuilder_Project>
diff --git a/src/Main/Forms/VolumeCreationWizard.cpp b/src/Main/Forms/VolumeCreationWizard.cpp
index 1dac1315..01fa8450 100644
--- a/src/Main/Forms/VolumeCreationWizard.cpp
+++ b/src/Main/Forms/VolumeCreationWizard.cpp
@@ -27,6 +27,7 @@
 #include "VolumeLocationWizardPage.h"
 #include "VolumePasswordWizardPage.h"
 #include "VolumeSizeWizardPage.h"
+#include "WaitDialog.h"
 
 namespace VeraCrypt
 {
@@ -865,7 +866,9 @@ namespace VeraCrypt
 						options->VolumeHeaderKdf = Pkcs5Kdf::GetAlgorithm (*SelectedHash);
 
 						Creator.reset (new VolumeCreator);
-						Creator->CreateVolume (options);
+						VolumeCreatorThreadRoutine routine(options, Creator);
+						WaitDialog dlg(this, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+						dlg.Run();
 
 						page->SetKeyInfo (Creator->GetKeyInfo());
 
diff --git a/src/Main/Forms/VolumeCreationWizard.h b/src/Main/Forms/VolumeCreationWizard.h
index 3a87c4cb..09bc1c34 100644
--- a/src/Main/Forms/VolumeCreationWizard.h
+++ b/src/Main/Forms/VolumeCreationWizard.h
@@ -54,7 +54,7 @@ namespace VeraCrypt
 		volatile bool AbortConfirmationPending;
 		volatile bool AbortRequested;
 		volatile bool CreationAborted;
-		auto_ptr <VolumeCreator> Creator;
+		shared_ptr <VolumeCreator> Creator;
 		bool CrossPlatformSupport;
 		static bool DeviceWarningConfirmed;
 		bool DisplayKeyInfo;
diff --git a/src/Main/Forms/WaitDialog.cpp b/src/Main/Forms/WaitDialog.cpp
new file mode 100755
index 00000000..a8290d10
--- /dev/null
+++ b/src/Main/Forms/WaitDialog.cpp
@@ -0,0 +1,94 @@
+/*
+ Copyright (c) 2014 IDRIX. All rights reserved.
+
+ Governed by the VeraCrypt License the full text of which is contained in
+ the file License.txt included in VeraCrypt binary and source code distribution
+ packages.
+*/
+
+#include "System.h"
+#include "Volume/EncryptionModeXTS.h"
+#include "Main/GraphicUserInterface.h"
+#include "Common/SecurityToken.h"
+#include "WaitDialog.h"
+
+namespace VeraCrypt
+{
+	DEFINE_EVENT_TYPE(wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED)
+
+	wxThread::ExitCode WaitThread::Entry()
+	{
+		wxCommandEvent finishEvent( wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED,0);
+		
+		m_pRoutine->Execute();
+		wxQueueEvent (m_pHandler, new wxCommandEvent( wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED,0));
+		return (wxThread::ExitCode)0; // success
+	}
+
+	void WaitDialog::ThrowException(Exception* ex)
+	{
+	#define VC_CONVERT_EXCEPTION(NAME) if (dynamic_cast<NAME*> (ex)) throw (NAME&) *ex;
+		VC_CONVERT_EXCEPTION (PasswordIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordKeyfilesIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordOrKeyboardLayoutIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordOrMountOptionsIncorrect);
+		VC_CONVERT_EXCEPTION (ProtectionPasswordIncorrect);
+		VC_CONVERT_EXCEPTION (ProtectionPasswordKeyfilesIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordEmpty);
+		VC_CONVERT_EXCEPTION (PasswordTooLong);
+		VC_CONVERT_EXCEPTION (UnportablePassword);
+		VC_CONVERT_EXCEPTION (ElevationFailed);
+		VC_CONVERT_EXCEPTION (RootDeviceUnavailable);
+		VC_CONVERT_EXCEPTION (DriveLetterUnavailable);
+		VC_CONVERT_EXCEPTION (DriverError);
+		VC_CONVERT_EXCEPTION (EncryptedSystemRequired);
+		VC_CONVERT_EXCEPTION (HigherFuseVersionRequired);
+		VC_CONVERT_EXCEPTION (KernelCryptoServiceTestFailed);
+		VC_CONVERT_EXCEPTION (LoopDeviceSetupFailed);
+		VC_CONVERT_EXCEPTION (MountPointRequired);
+		VC_CONVERT_EXCEPTION (MountPointUnavailable);
+		VC_CONVERT_EXCEPTION (NoDriveLetterAvailable);
+		VC_CONVERT_EXCEPTION (TemporaryDirectoryFailure);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSizeHiddenVolumeProtection);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSizeNoKernelCrypto);
+		VC_CONVERT_EXCEPTION (VolumeAlreadyMounted);
+		VC_CONVERT_EXCEPTION (VolumeSlotUnavailable);
+		VC_CONVERT_EXCEPTION (UserInterfaceException);
+		VC_CONVERT_EXCEPTION (MissingArgument);
+		VC_CONVERT_EXCEPTION (NoItemSelected);
+		VC_CONVERT_EXCEPTION (StringFormatterException);	
+		VC_CONVERT_EXCEPTION (ExecutedProcessFailed);
+		VC_CONVERT_EXCEPTION (AlreadyInitialized);
+		VC_CONVERT_EXCEPTION (AssertionFailed);
+		VC_CONVERT_EXCEPTION (ExternalException);
+		VC_CONVERT_EXCEPTION (InsufficientData);
+		VC_CONVERT_EXCEPTION (NotApplicable);
+		VC_CONVERT_EXCEPTION (NotImplemented);
+		VC_CONVERT_EXCEPTION (NotInitialized);
+		VC_CONVERT_EXCEPTION (ParameterIncorrect);
+		VC_CONVERT_EXCEPTION (ParameterTooLarge);
+		VC_CONVERT_EXCEPTION (PartitionDeviceRequired);
+		VC_CONVERT_EXCEPTION (StringConversionFailed);
+		VC_CONVERT_EXCEPTION (TestFailed);
+		VC_CONVERT_EXCEPTION (TimeOut);
+		VC_CONVERT_EXCEPTION (UnknownException);
+		VC_CONVERT_EXCEPTION (UserAbort)
+		VC_CONVERT_EXCEPTION (CipherInitError);
+		VC_CONVERT_EXCEPTION (WeakKeyDetected);	
+		VC_CONVERT_EXCEPTION (HigherVersionRequired);
+		VC_CONVERT_EXCEPTION (KeyfilePathEmpty);
+		VC_CONVERT_EXCEPTION (MissingVolumeData);
+		VC_CONVERT_EXCEPTION (MountedVolumeInUse);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSize);
+		VC_CONVERT_EXCEPTION (VolumeEncryptionNotCompleted);
+		VC_CONVERT_EXCEPTION (VolumeHostInUse);
+		VC_CONVERT_EXCEPTION (VolumeProtected);
+		VC_CONVERT_EXCEPTION (VolumeReadOnly);
+		VC_CONVERT_EXCEPTION (Pkcs11Exception);
+		VC_CONVERT_EXCEPTION (InvalidSecurityTokenKeyfilePath);
+		VC_CONVERT_EXCEPTION (SecurityTokenLibraryNotInitialized);
+		VC_CONVERT_EXCEPTION (SecurityTokenKeyfileAlreadyExists);
+		VC_CONVERT_EXCEPTION (SecurityTokenKeyfileNotFound);	
+		throw *ex;
+	}
+}
diff --git a/src/Main/Forms/WaitDialog.h b/src/Main/Forms/WaitDialog.h
new file mode 100755
index 00000000..c9e0d56e
--- /dev/null
+++ b/src/Main/Forms/WaitDialog.h
@@ -0,0 +1,90 @@
+/*
+ Copyright (c) 2014 IDRIX. All rights reserved.
+
+ Governed by the VeraCrypt License the full text of which is contained in
+ the file License.txt included in VeraCrypt binary and source code distribution
+ packages.
+*/
+
+#ifndef TC_HEADER_Main_Forms_WaitDialog
+#define TC_HEADER_Main_Forms_WaitDialog
+
+#include "Forms.h"
+#include "Main/Main.h"
+
+namespace VeraCrypt
+{
+
+	DECLARE_LOCAL_EVENT_TYPE(wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED, -1);
+	
+	class WaitDialog;
+
+
+
+	class WaitThread : public wxThread
+	{
+	public:
+		WaitThread(WaitDialog *handler, WaitThreadRoutine* pRoutine) : wxThread(wxTHREAD_DETACHED), m_pRoutine(pRoutine)
+		{
+			m_pHandler = handler;			
+		}
+		~WaitThread()
+		{			
+		}
+		
+	protected:
+		virtual ExitCode Entry();
+		WaitDialog *m_pHandler;
+		WaitThreadRoutine* m_pRoutine;
+	};
+
+	class WaitDialog : public WaitDialogBase, public WaitThreadUI
+	{
+	public:
+		WaitDialog (wxWindow *parent, const wxString& label, WaitThreadRoutine* pRoutine) 
+			: WaitDialogBase(parent), WaitThreadUI(pRoutine), m_timer (this)
+		{
+			WaitStaticText->SetLabel (label);
+			WaitProgessBar->Pulse();
+			Layout();
+			GetSizer()->Fit( this );
+			Centre( wxBOTH );
+			Connect( wxID_ANY, wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED, wxCommandEventHandler( WaitDialog::OnThreadCompletion ) );
+			Connect( wxEVT_TIMER, wxTimerEventHandler( WaitDialog::OnProgressTimer ), NULL, this );
+			m_thread = new WaitThread(this, pRoutine);
+		}
+		
+		~WaitDialog()
+		{
+			Disconnect( wxEVT_TIMER, wxTimerEventHandler( WaitDialog::OnProgressTimer ));
+			Disconnect( wxID_ANY, wxEVT_COMMAND_WAITDIALOGTHREAD_COMPLETED, wxCommandEventHandler( WaitDialog::OnThreadCompletion ) );
+		}
+
+		virtual void OnWaitDialogInit( wxInitDialogEvent& event )
+		{	
+			m_thread->Run();
+			m_timer.Start(100);
+		}
+		
+		// virtual void OnWaitDialogClose( wxCloseEvent& event ) { }
+		void OnThreadCompletion(wxCommandEvent &)
+		{
+			EndModal(0);
+		}
+		
+		void OnProgressTimer(wxTimerEvent& event)
+		{
+			WaitProgessBar->Pulse();
+		}
+
+		virtual void Run(void) { ShowModal(); if (m_pRoutine->HasException()) ThrowException(m_pRoutine->m_pException); }
+
+		void ThrowException(Exception* ex);
+
+	protected:
+		WaitThread* m_thread;
+		wxTimer m_timer;	
+	};
+}
+
+#endif // TC_HEADER_Main_Forms_WaitDialog
diff --git a/src/Main/GraphicUserInterface.cpp b/src/Main/GraphicUserInterface.cpp
index 78e0e34d..5ddcfa61 100755
--- a/src/Main/GraphicUserInterface.cpp
+++ b/src/Main/GraphicUserInterface.cpp
@@ -30,6 +30,7 @@
 #include "Forms/MountOptionsDialog.h"
 #include "Forms/RandomPoolEnrichmentDialog.h"
 #include "Forms/SecurityTokenKeyfilesDialog.h"
+#include "Forms/WaitDialog.h"
 
 namespace VeraCrypt
 {
@@ -173,7 +174,7 @@ namespace VeraCrypt
 				try
 				{
 					wxBusyCursor busy;
-					volume = Core->OpenVolume (
+					OpenVolumeThreadRoutine routine(
 						options->Path,
 						options->PreserveTimestamps,
 						options->Password,
@@ -187,6 +188,10 @@ namespace VeraCrypt
 						volumeType,
 						options->UseBackupHeaders
 						);
+						WaitDialog dlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+						dlg.Run();
+		
+						volume = routine.m_pVolume;
 				}
 				catch (PasswordException &e)
 				{
@@ -263,14 +268,18 @@ namespace VeraCrypt
 
 			// Re-encrypt volume header
 			SecureBuffer newHeaderBuffer (normalVolume->GetLayout()->GetHeaderSize());
-			Core->ReEncryptVolumeHeaderWithNewSalt (newHeaderBuffer, normalVolume->GetHeader(), normalVolumeMountOptions.Password, normalVolumeMountOptions.Keyfiles);
+			ReEncryptHeaderThreadRoutine routine(newHeaderBuffer, normalVolume->GetHeader(), normalVolumeMountOptions.Password, normalVolumeMountOptions.Keyfiles);
+			WaitDialog dlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+			dlg.Run();
 
 			backupFile.Write (newHeaderBuffer);
 
 			if (hiddenVolume)
 			{
 				// Re-encrypt hidden volume header
-				Core->ReEncryptVolumeHeaderWithNewSalt (newHeaderBuffer, hiddenVolume->GetHeader(), hiddenVolumeMountOptions.Password, hiddenVolumeMountOptions.Keyfiles);
+				ReEncryptHeaderThreadRoutine hiddenRoutine(newHeaderBuffer, hiddenVolume->GetHeader(), hiddenVolumeMountOptions.Password, hiddenVolumeMountOptions.Keyfiles);
+				WaitDialog hiddenDlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &hiddenRoutine);
+				hiddenDlg.Run();
 			}
 			else
 			{
@@ -1259,7 +1268,7 @@ namespace VeraCrypt
 				try
 				{
 					wxBusyCursor busy;
-					volume = Core->OpenVolume (
+					OpenVolumeThreadRoutine routine(
 						options.Path,
 						options.PreserveTimestamps,
 						options.Password,
@@ -1273,6 +1282,10 @@ namespace VeraCrypt
 						VolumeType::Unknown,
 						true
 						);
+						WaitDialog dlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+						dlg.Run();
+		
+						volume = routine.m_pVolume;
 				}
 				catch (PasswordException &e)
 				{
@@ -1293,7 +1306,9 @@ namespace VeraCrypt
 			// Re-encrypt volume header
 			wxBusyCursor busy;
 			SecureBuffer newHeaderBuffer (volume->GetLayout()->GetHeaderSize());
-			Core->ReEncryptVolumeHeaderWithNewSalt (newHeaderBuffer, volume->GetHeader(), options.Password, options.Keyfiles);
+			ReEncryptHeaderThreadRoutine routine(newHeaderBuffer, volume->GetHeader(), options.Password, options.Keyfiles);
+			WaitDialog dlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+			dlg.Run();
 
 			// Write volume header
 			int headerOffset = volume->GetLayout()->GetHeaderOffset();
@@ -1377,7 +1392,15 @@ namespace VeraCrypt
 
 						// Decrypt header
 						shared_ptr <VolumePassword> passwordKey = Keyfile::ApplyListToPassword (options.Keyfiles, options.Password);
-						if (layout->GetHeader()->Decrypt (headerBuffer, *passwordKey, options.Kdf, layout->GetSupportedKeyDerivationFunctions(), layout->GetSupportedEncryptionAlgorithms(), layout->GetSupportedEncryptionModes()))
+						Pkcs5KdfList keyDerivationFunctions = layout->GetSupportedKeyDerivationFunctions();
+						EncryptionAlgorithmList encryptionAlgorithms = layout->GetSupportedEncryptionAlgorithms();
+						EncryptionModeList encryptionModes = layout->GetSupportedEncryptionModes();
+
+						DecryptThreadRoutine decryptRoutine(layout->GetHeader(), headerBuffer, *passwordKey, options.Kdf, keyDerivationFunctions, encryptionAlgorithms, encryptionModes);
+						WaitDialog decryptDlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &decryptRoutine);
+						decryptDlg.Run();
+
+						if (decryptRoutine.m_bResult)
 						{
 							decryptedLayout = layout;
 							break;
@@ -1402,7 +1425,9 @@ namespace VeraCrypt
 			// Re-encrypt volume header
 			wxBusyCursor busy;
 			SecureBuffer newHeaderBuffer (decryptedLayout->GetHeaderSize());
-			Core->ReEncryptVolumeHeaderWithNewSalt (newHeaderBuffer, decryptedLayout->GetHeader(), options.Password, options.Keyfiles);
+			ReEncryptHeaderThreadRoutine routine(newHeaderBuffer, decryptedLayout->GetHeader(), options.Password, options.Keyfiles);
+			WaitDialog dlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+			dlg.Run();
 
 			// Write volume header
 			int headerOffset = decryptedLayout->GetHeaderOffset();
@@ -1416,7 +1441,9 @@ namespace VeraCrypt
 			if (decryptedLayout->HasBackupHeader())
 			{
 				// Re-encrypt backup volume header
-				Core->ReEncryptVolumeHeaderWithNewSalt (newHeaderBuffer, decryptedLayout->GetHeader(), options.Password, options.Keyfiles);
+				ReEncryptHeaderThreadRoutine backupRoutine(newHeaderBuffer, decryptedLayout->GetHeader(), options.Password, options.Keyfiles);
+				WaitDialog backupDlg(parent, LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &backupRoutine);
+				backupDlg.Run();
 				
 				// Write backup volume header
 				headerOffset = decryptedLayout->GetBackupHeaderOffset();
@@ -1758,6 +1785,20 @@ namespace VeraCrypt
 #endif
 	}
 
+	WaitThreadUI* GraphicUserInterface::GetWaitThreadUI(WaitThreadRoutine *pRoutine) const
+	{
+		return new WaitDialog(GetTopWindow(), LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], pRoutine);
+	}
+
+	shared_ptr <VolumeInfo> GraphicUserInterface::MountVolumeThread (MountOptions &options) const
+	{
+		MountThreadRoutine routine(options);
+		WaitDialog dlg(GetTopWindow(), LangString["IDT_STATIC_MODAL_WAIT_DLG_INFO"], &routine);
+		dlg.Run();
+		
+		return routine.m_pVolume;
+	}
+
 	DEFINE_EVENT_TYPE (TC_EVENT_THREAD_EXITING);
 
 	GraphicUserInterface *Gui = nullptr;
diff --git a/src/Main/GraphicUserInterface.h b/src/Main/GraphicUserInterface.h
index 890ab5d6..f7d6d709 100755
--- a/src/Main/GraphicUserInterface.h
+++ b/src/Main/GraphicUserInterface.h
@@ -88,6 +88,8 @@ namespace VeraCrypt
 		virtual bool UpdateListCtrlItem (wxListCtrl *listCtrl, long itemIndex, const vector <wstring> &itemFields) const;
 		virtual void UserEnrichRandomPool (wxWindow *parent, shared_ptr <Hash> hash = shared_ptr <Hash>()) const;
 		virtual void Yield () const;
+		virtual WaitThreadUI* GetWaitThreadUI(WaitThreadRoutine *pRoutine) const;
+		virtual shared_ptr <VolumeInfo> MountVolumeThread (MountOptions &options) const;
 
 #ifdef TC_MACOSX
 		virtual void MacOpenFile (const wxString &fileName);
diff --git a/src/Main/Main.make b/src/Main/Main.make
index f373debd..02577d8d 100644
--- a/src/Main/Main.make
+++ b/src/Main/Main.make
@@ -52,6 +52,7 @@ OBJS += Forms/VolumeFormatOptionsWizardPage.o
 OBJS += Forms/VolumeLocationWizardPage.o
 OBJS += Forms/VolumePasswordWizardPage.o
 OBJS += Forms/VolumeSizeWizardPage.o
+OBJS += Forms/WaitDialog.o
 OBJS += Forms/WizardFrame.o
 endif
 
diff --git a/src/Main/UserInterface.cpp b/src/Main/UserInterface.cpp
index 4306dec2..73db03dc 100755
--- a/src/Main/UserInterface.cpp
+++ b/src/Main/UserInterface.cpp
@@ -17,6 +17,7 @@
 #include "Platform/Unix/Process.h"
 #endif
 #include "Platform/SystemInfo.h"
+#include "Platform/SystemException.h"
 #include "Common/SecurityToken.h"
 #include "Volume/EncryptionTest.h"
 #include "Application.h"
@@ -729,7 +730,8 @@ namespace VeraCrypt
 
 		try
 		{
-			volume = Core->MountVolume (options);
+			volume = MountVolumeThread (options);
+
 		}
 		catch (VolumeHostInUse&)
 		{
@@ -1496,4 +1498,73 @@ namespace VeraCrypt
 			return L"?";
 		}
 	}
+
+	#define VC_CONVERT_EXCEPTION(NAME) if (dynamic_cast<NAME*> (ex)) throw (NAME&) *ex;
+
+	void UserInterface::ThrowException (Exception* ex)
+	{
+		VC_CONVERT_EXCEPTION (PasswordIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordKeyfilesIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordOrKeyboardLayoutIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordOrMountOptionsIncorrect);
+		VC_CONVERT_EXCEPTION (ProtectionPasswordIncorrect);
+		VC_CONVERT_EXCEPTION (ProtectionPasswordKeyfilesIncorrect);
+		VC_CONVERT_EXCEPTION (PasswordEmpty);
+		VC_CONVERT_EXCEPTION (PasswordTooLong);
+		VC_CONVERT_EXCEPTION (UnportablePassword);
+		VC_CONVERT_EXCEPTION (ElevationFailed);
+		VC_CONVERT_EXCEPTION (RootDeviceUnavailable);
+		VC_CONVERT_EXCEPTION (DriveLetterUnavailable);
+		VC_CONVERT_EXCEPTION (DriverError);
+		VC_CONVERT_EXCEPTION (EncryptedSystemRequired);
+		VC_CONVERT_EXCEPTION (HigherFuseVersionRequired);
+		VC_CONVERT_EXCEPTION (KernelCryptoServiceTestFailed);
+		VC_CONVERT_EXCEPTION (LoopDeviceSetupFailed);
+		VC_CONVERT_EXCEPTION (MountPointRequired);
+		VC_CONVERT_EXCEPTION (MountPointUnavailable);
+		VC_CONVERT_EXCEPTION (NoDriveLetterAvailable);
+		VC_CONVERT_EXCEPTION (TemporaryDirectoryFailure);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSizeHiddenVolumeProtection);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSizeNoKernelCrypto);
+		VC_CONVERT_EXCEPTION (VolumeAlreadyMounted);
+		VC_CONVERT_EXCEPTION (VolumeSlotUnavailable);
+		VC_CONVERT_EXCEPTION (UserInterfaceException);
+		VC_CONVERT_EXCEPTION (MissingArgument);
+		VC_CONVERT_EXCEPTION (NoItemSelected);
+		VC_CONVERT_EXCEPTION (StringFormatterException);	
+		VC_CONVERT_EXCEPTION (ExecutedProcessFailed);
+		VC_CONVERT_EXCEPTION (AlreadyInitialized);
+		VC_CONVERT_EXCEPTION (AssertionFailed);
+		VC_CONVERT_EXCEPTION (ExternalException);
+		VC_CONVERT_EXCEPTION (InsufficientData);
+		VC_CONVERT_EXCEPTION (NotApplicable);
+		VC_CONVERT_EXCEPTION (NotImplemented);
+		VC_CONVERT_EXCEPTION (NotInitialized);
+		VC_CONVERT_EXCEPTION (ParameterIncorrect);
+		VC_CONVERT_EXCEPTION (ParameterTooLarge);
+		VC_CONVERT_EXCEPTION (PartitionDeviceRequired);
+		VC_CONVERT_EXCEPTION (StringConversionFailed);
+		VC_CONVERT_EXCEPTION (TestFailed);
+		VC_CONVERT_EXCEPTION (TimeOut);
+		VC_CONVERT_EXCEPTION (UnknownException);
+		VC_CONVERT_EXCEPTION (UserAbort)
+		VC_CONVERT_EXCEPTION (CipherInitError);
+		VC_CONVERT_EXCEPTION (WeakKeyDetected);	
+		VC_CONVERT_EXCEPTION (HigherVersionRequired);
+		VC_CONVERT_EXCEPTION (KeyfilePathEmpty);
+		VC_CONVERT_EXCEPTION (MissingVolumeData);
+		VC_CONVERT_EXCEPTION (MountedVolumeInUse);
+		VC_CONVERT_EXCEPTION (UnsupportedSectorSize);
+		VC_CONVERT_EXCEPTION (VolumeEncryptionNotCompleted);
+		VC_CONVERT_EXCEPTION (VolumeHostInUse);
+		VC_CONVERT_EXCEPTION (VolumeProtected);
+		VC_CONVERT_EXCEPTION (VolumeReadOnly);
+		VC_CONVERT_EXCEPTION (Pkcs11Exception);
+		VC_CONVERT_EXCEPTION (InvalidSecurityTokenKeyfilePath);
+		VC_CONVERT_EXCEPTION (SecurityTokenLibraryNotInitialized);
+		VC_CONVERT_EXCEPTION (SecurityTokenKeyfileAlreadyExists);
+		VC_CONVERT_EXCEPTION (SecurityTokenKeyfileNotFound);
+		VC_CONVERT_EXCEPTION (SystemException);
+		throw *ex;
+	}
 }
diff --git a/src/Main/UserInterface.h b/src/Main/UserInterface.h
index ae74ae99..a280bcc2 100755
--- a/src/Main/UserInterface.h
+++ b/src/Main/UserInterface.h
@@ -54,6 +54,7 @@ namespace VeraCrypt
 		virtual void ListMountedVolumes (const VolumeInfoList &volumes) const;
 		virtual void ListSecurityTokenKeyfiles () const = 0;
 		virtual shared_ptr <VolumeInfo> MountVolume (MountOptions &options) const;
+		virtual shared_ptr <VolumeInfo> MountVolumeThread (MountOptions &options) const { return Core->MountVolume (options);}
 		virtual VolumeInfoList MountAllDeviceHostedVolumes (MountOptions &options) const;
 		virtual VolumeInfoList MountAllFavoriteVolumes (MountOptions &options);
 		virtual void OpenExplorerWindow (const DirectoryPath &path);
@@ -75,6 +76,7 @@ namespace VeraCrypt
 		virtual wxString TimeSpanToString (uint64 seconds) const;
 		virtual bool VolumeHasUnrecommendedExtension (const VolumePath &path) const;
 		virtual void Yield () const = 0;
+		virtual WaitThreadUI* GetWaitThreadUI(WaitThreadRoutine *pRoutine) const { return new WaitThreadUI(pRoutine);}
 		virtual wxDateTime VolumeTimeToDateTime (VolumeTime volumeTime) const { return wxDateTime ((time_t) (volumeTime / 1000ULL / 1000 / 10 - 134774ULL * 24 * 3600)); }
 		virtual wxString VolumeTimeToString (VolumeTime volumeTime) const;
 		virtual wxString VolumeTypeToString (VolumeType::Enum type, VolumeProtection::Enum protection) const;
@@ -88,6 +90,8 @@ namespace VeraCrypt
 			const UserInterface *UI;
 		};
 
+		static void ThrowException (Exception* ex);
+
 	protected:
 		UserInterface ();
 		virtual bool OnExceptionInMainLoop () { throw; }