I recently noticed that my win7 backups were not working, event viewer error 0x8007002 .. I initially believed it to be something I had installed along the way so I decide to reinstall (win7 x86_64 OEM) this past weekend and perform step by step tests to see when it began failing. On Tuesday night, I got around to reconnecting my ubuntu (karmic) drive and set my mb default boot to that drive and kept going as normal. Then I decided to try a win7 backup and it failed. What I've determined per my system setup is that when I boot win7 from grub, backup fails with the 0x80070002 error, but when I boot directly from the win7 drive using the installed win7 MBR, backup works correctly again. I know I can get this to repeat on my system, secondary confirmation would be great. I use separate drives for my operating systems so for me, it's as easy as hitting my esc key during bootup and choosing whatever boot device I want. I also wanted to make sure this is at least in some small way documented somewhere in the event there are others running into the same thing. What this affected for me - Macrium Reflect fails backups (needs working VSS) Windows backup fails Windows backup system image creation fails Windows system restore fails to create new restore points (restored to a previous time, the system restore point to revert back to original failed to create during the restore process)