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No restore points are available when you use Windows Vista, Windows 7 or Windows Server 2008-based operating systems in a dual-boot configuration together with an earlier Windows operating system
Article ID: 926185 - View products that this article applies to.
When you use the System Restore feature in Windows Vista, you receive the following message:Additionally, only the most recent backup files from Windows Vista Complete PC Backup are available. Earlier versions of the backup files are unavailable. You experience this problem if you are running Windows Vista, Windows 7, Windows Server 2008, or Windows Server 2008 R2 on a computer that is also configured to run an earlier Windows operating system.
Note This configuration is known as a "dual-boot configuration."
This problem occurs when you start the computer by using the earlier operating system, such as Microsoft Windows XP or Microsoft Windows Server 2003. In this situation, the earlier operating system deletes all the restore points that were created in Windows Vista. The earlier operating system also deletes all Complete PC Backup files except the most recent version of these backup files.
You can use either of the following methods to work around this problem.
Method 1To keep Windows XP from deleting restore points of the volume in Windows Vista, add the following registry entry under the
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\Offlineregistry subkey in Windows XP:
Value name: \DosDevices\D:
Value data: 1
Note If the
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\Offlineregistry subkey does not exist, you must manually create this registry subkey. Create this registry entry when you have installed Windows Vista on the "D" partition in Windows XP.
Effects of this workaroundAfter you restart Windows XP, you cannot access the volume that is created in Windows Vista from Windows XP. However, you can still access the volume that is created in Windows XP from Windows Vista. You must use Windows XP drive or an additional drive such as a USB thumb drive for data exchange.
Limitations of this workaroundThis workaround only protects the volume in Windows Vista from being accessed or changed by Windows XP. If you have more volumes or if you want to add a volume from Windows XP to the system restore settings in Windows Vista, the system restore (Volume-Shadow-Data) on those volumes will be still overwritten. To avoid this problem, you must add those volumes to the
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\Offlinesubkey. If you add the Windows XP volume to that subkey or if you delete this volume drive letter, you cannot then start Windows XP.
You can use this workaround only when the restore points for Windows XP and for Windows Vista are mutually exclusive. The restore points are mutual exclusive when no restore points are common across the volume in Windows XP or the volume in Windows Vista. For example, consider the following scenario:
In this scenario, the Windows Vista restore points are added on the E driver. Then, you must change the registry entry of the E driver under the
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\Offline" registry subkey to 1.
Also, a common volume can be used for data exchange between Windows XP and Windows Vista. However, restore points must not be defined on this common volume.
Support Status of this workaroundAdding this key can have unwanted side-effects to your installation. For example, applications that put data on this drive before available may fail. If there is a reporting problem reported to Microsoft, you will be asked to delete this value
Method 2To work around this problem, use the Bitlocker feature on the volume in Windows Vista.
Bitlocker is a built-in security feature in Windows Vista. When Windows Vista starts, the Bitlocker feature should be enabled on the Windows Vista volume on which Windows Vista restore points are enabled. When Windows XP or Windows Server 2003 starts, the Windows Vista volume on which the Bitlocker feature is enabled is inaccessible. Therefore, the Windows Vista restore points are intact.
This workaround works for dual-boot configurations (Windows XP or Windows Server 2003 together with Windows Vista).This workaround requires no changes to Windows XP. Therefore, the volume in Windows Vista is still inaccessible when the system is started in Windows XP or in Windows Server 2003.
Note The Bitlocker feature is available for Windows Vista Enterprise Editions and for Windows Vista Ultimate Editions.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to configure a dual-boot environment in Windows Vista, visit the following Microsoft Web site:
Information for advanced usersConsider the following scenario. A shadow copy is created on a volume in Windows Vista or in Windows Server 2008. Then, you access the volume from an earlier Windows operating system. In this scenario, the shadow copy is deleted. You experience this problem if one or more of the following conditions are true:
Article ID: 926185 - Last Review: January 31, 2008 - Revision: 4.4