If you boot into 7, all restore points on 8 are deleted.
If you have like me a triple boot with 8, 7 and XP, although 8 is installed on a separate drive, the restore points are still deleted when booting into 7 OR indeed into XP
Please see my screenshots
1. The registry edit with new key is in 7 to prevent restore points being deleted in 8 - when booting into 7. THE edit is in the earlier O/S registry NOT in 8 and the \J is the drive letter where 8 is installed.
2. The edit in XP with the TWO entries \DosDevices\F: and \J one preventing points being deleted in 7 and the other in 8
IF you are dual booting 8 and 7 THIS IS DONE in regedit in 7
SO in regedit you go to HKEY Local Machine System
You scroll to Mounted Devices
You create a new key Offline by right clicking on Mounted devices and clicking new and key
You then create by clicking on the main pane NEW and DWord
\DosDevices\X: (where X is the driver letter of the Windows 8 O/S) on my setup it is J
You then right click DosDevices and click modify - you then type 1 in the value
If like me you have a triple boot then it is also necessary to regedit in XP
where you then have those entries for the drive with 7 and the drive with 8.
Edited by Macboatmaster, 21 January 2013 - 01:49 PM.