Have you tried hitting F8 or F12 when you first boot up, before you get to any XP screens? If not, try that, then do a system restore. sounds simple, but I had the same thing last year.are you running a dell?
For a while I was infrequently getting the blue screen signaling a total physical memory dump, and didn't think much of it. Now I can't even start up windows (even in safe mode) because when I do, it does the memory dump. Any help would be much appreciated.