Formatted my computer and re-installed winxp. Latest win updates including service pack two. Computer just freezes every once in a while. Half the time when it freezes a loud high pitched noise will ring from the speakers. Doubt its over-heating, never had that problem before, and like i said, have just reformatted so cannot imagine what could be causing the crashes. It happened a bit before the format but not so frequently.
Often they occur when the computer is being worked hard - burning a dvd, playing a game. Others its completely random - browsing a web page.
Athlon xp2700, 1gig ram.