
Originally Posted by
Gippo
might not be bad ram. registry might have gotten corrupted(bad os). Slave the drive and look for system volume information directory. Try to find a snapshot of before the event. Copy Sam, Security, Software, System and Default to windows\system32\config directory with no extensions.
reboot and see if it works.
you can also verify a corrupt os by booting to safe mode like the above poster said, or by inserting an xp installation cd and proceeding with instructions until it searches for previous versions of windows on the drive.