BSOD - registry problem

I have a dual boot of vista + XP on my computer. I've left my XP running on for probably weeks and restarted it today. After it tries to load, it black screens for about 30 seconds and before it gets to the "Welcome" screen, i get a BSOD that says something along the lines of

HP: c0000218
Registry file failure, registry cannot load
Systemroot\System32\config\SOFTWARE

physical dump blah blah blah

===============

A. Any way to fix this problem?

B. How does maple work with vista? I haven't ran it on vista in probably half a year or longer, but if it's fine now, even just to afk, i'll probably just keep vista

C. Somewhat unrelated, but is there any possible way to see what firefox tabs I had while running XP if I am running my firefox in vista?

http://www.easydesksoftware.com/news/news32.htm
http://support.microsoft.com/kb/307545
Sounds to me like you've got a corrupted registry.
You didn't turn the console off, while you were saving your game, did you? D: