I posted in the Overclocking forum, but maybe this is more appropriate.
I have an AMD XP2000+ processor and Win XP Pro with almost nothing else installed (just built the system), except a few drivers and some games (Civ). It all worked fine for a couple of days, but now it keeps freezing (I haven't installed anything in between). I log on, don't start any programs, and the system still does this. It might be fine a short while, then it stops for maybe 20 seconds, works for a while, and stops again.
I have no internet connection yet, but I've tried disabling network stuff.
The CPU temperature is around 55 degrees Celsius. But I don't get any error report about this.