Windows Setup: Warn about Fast Startup during install if it is enabled and propose to disable it at the end of the installation.

src/Setup/Setup.c

@@ -2362,6 +2362,15 @@ void DoInstall (void *arg)
 
 	if (bOK && !bUninstall && !bDowngrade && !bRepairMode && !bDevm)
 	{
+		BOOL bHibernateEnabled = FALSE, bHiberbootEnabled = FALSE;
+		if (GetHibernateStatus (bHibernateEnabled, bHiberbootEnabled))
+		{
+			if (bHiberbootEnabled)
+			{
+				bPromptFastStartup = TRUE;
+			}
+		}
+
 		if (!IsHiddenOSRunning())	// A hidden OS user should not see the post-install notes twice (on decoy OS and then on hidden OS).
 		{
 			if (bRestartRequired || SystemEncryptionUpdate)

src/Setup/Wizard.c

@@ -60,6 +60,7 @@ BOOL bStartExtraction = FALSE;
 BOOL bInProgress = FALSE;
 BOOL bPromptTutorial = FALSE;
 BOOL bPromptReleaseNotes = FALSE;
+BOOL bPromptFastStartup = FALSE;
 
 extern BOOL bUserSetLanguage;
 
@@ -1203,6 +1204,15 @@ BOOL CALLBACK MainDialogProc (HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPa
 				bPromptTutorial = FALSE;
 			}
 
+			if (bPromptFastStartup
+				&& AskWarnYesNo ("CONFIRM_DISABLE_FAST_STARTUP", hwndDlg) == IDYES)
+			{
+				WriteLocalMachineRegistryDword (L"SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Power", L"HiberbootEnabled", 0);
+				bRestartRequired = TRUE;
+			}
+
+			bPromptFastStartup = FALSE;
+
 			if (bRestartRequired
 				&& AskYesNo (bUpgrade ? "UPGRADE_OK_REBOOT_REQUIRED" : "CONFIRM_RESTART", hwndDlg) == IDYES)
 			{

src/Setup/Wizard.h

@@ -25,6 +25,7 @@ BOOL CALLBACK MainDialogProc ( HWND hwndDlg , UINT uMsg , WPARAM wParam , LPARAM
 
 extern BOOL bPromptTutorial;
 extern BOOL bPromptReleaseNotes;
+extern BOOL bPromptFastStartup;
 
 #ifdef __cplusplus
 }