Master error log?

Well, I've been running my laptop on a burnt out pair of 8800 GTX's four times over now, and my computer has begun restarting after being on for a couple hours, randomly. I'll be doing something in an IE window (no pattern, except JAVA is being used in real-time for a chat window perhaps the only consistent pattern), and the computer will freeze for about 20 seconds, then restart like normal.

I'm running XP Pro 32-bit. Is there a way to check some kind of master log or record to see what prompted the reboot? There was no error message or anything - the screen simply froze (including my G15 screen), went black (or grey the first time, usually signifies the video cards are dead, but they're not..), and restarted as usual, not taking unusually long or anything.

I want to make sure this is the video cards being faulty prompting this, and not my WD 320 gb.

 

Probably the closest thing you are looking for is the Event viewer. Under the systems tab, it will log an event whenever a device driver fails or such.

If there is a curious event listed under there, you can use TechNet to look up more information about it

http://www.microsoft.com/technet/support/ee/ee_advanced.aspx

for your harddrive, I suggest you at least check it with a program like HD tune.