I have the same problem as this person here:
I cannot boot into windows, I get as far as the screen asking me to boot to safe mode, with networking, with cmd prompt, last good settings, normal boot... but no matter what I choose, the computer just restarts and brings me back to the same "menu".
If I try to boot from a windows xp cd, I get to the "windows is checking for your hardware configuration" (or something like that) and then the screen goes blank... forever.
Luckily I was dual booting xp pro and linux, so I'm in Linux right now (which leads me to think this is not a hardware issue)
How the problem started:
Well, I play everquest 2... and sunday, it kept crashing on me for some reason... So I being addicted, and angry, decided to do a "completely reversible" system restore.
And it wouldnt boot after that...
I hope someone can help