taking a photo was a good idea - I made a video as the STOP-message of windows appears only for a very short time.
So I get a BSOD, nothing from the partition manager itself.
In the F8-menu of windows there is an option like "disable restart on errors" - as I'm working with a german version, I can't tell you what it says exactly in the english version.
Unfortunately its just a STOP 0x000... message without any related files.
Repairing windows with the win7-cd didn't work either.
My harddisk is partioned like this:
Also there is a second harddisk with drive letters X and Y. I unplugged it for now, but this didn't help either. My last backup of the system drive is from april 2011, I fear I'll have to take this one.
Only thing I made with the partition manager is making space in front of drive D:, and extending space on drive C: Then I pressed apply and let the system restart. Seems like the partition manager didn't had the chance to resize anything, but somehow It just won't let me boot anymore.