Computer tip: fix dual boot restore points

I had this issue with my setup. Previously, I had a dual boot configuration of Windows XP and Windows Vista and now with Windows 7 and Windows XP. Problem was that the restore points are available in Windows 7 or Vista after you boot out of Windows XP. I won’t get into the details [you can look at http://support.microsoft.com/kb/926185/en-us for yourself], but this KB helps in a workaround.

Note: In my case, I have my common data [My Documents, and other stuff] on a third partition. So both operating systems look at that partition instead of where they nomally are.

There are two workarounds in the KB. I use the first one which basically tells Windows XP that the Windows 7 partition is offline. Assuming the C driver is a volume in Windows XP and the D driver is a volume in Windows 7 [or Vista], access the registry editor:

  1. Go to HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\Offline
  2. Add the dword value name \DosDevices\D: and assign it the value of 1.
  3. Reboot.

Warning: You must specify the correct drive letter or you may not be able to access a partition or Windows anymore.

The next time you open Windows XP, Windows 7 [or Vista] will be offline – actually looks like an empty drive.

Note: Do not try to create or save anything into the drive or format!

If you boot into Windows 7 [or Vista], the Windows XP partition will be fully accessible.

These changes may or may not work in other versions of Windows. Make sure drivers or applications for Windows XP are not installed in the Windows 7 [or Vista] partition [not a good practice anyways]. Consult the KB for further information.

As usual, when editing the registry, back it up first. Still, use this information at your own risk.

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About ebraiter
computer guy

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