what happens to the VM after an unrelated black screen of death

I have a question, I am running 2x2.66 ghz dual core intel xeon, and been having trouble lately with alot of black screen of deaths, and it s not related to the parallels at all as i searched thru the forum. The BSODs is related to RAM/firefox. Don't ask me why.

Anyway my question is,sometimes I have parallels running in the background with xp. So after a BSOD happens, i reboot, and then open up the Parallels, and it goes back to the configuration window and t says Stopped. SO is there anything I shld do to make sure that the XP system is not corrupted from the crash? Any specific steps to make sure it;s running smoothly? Does it go back to the last snapshot(or whatever it was when i shut down the windows before the crash occured)?

Thanks