Hmmm... First of all, did you build the PC yourself? because I've seen something similar happen when the Motherboard wires weren't connected right. Also, when did it start doing it? Recently, or as it always done it? Thridly, did you add any new software or patches?
Still weak, I know, but getting better:
CPU: AMD AthlonXP 2500+
1.8GHz @ 333 FSB
512 DDR 2700
160 GB westerndigital hd
Dual booted with XP/Fedora Core 5
PCchips M848A mobo
nVIDIA GeForce MX 4000 video Card
Associate\'s Degree in Applied Computer Sciences.
A+ Certified for Hardware and Operating Systems. Network+ Certified