OK, my computer's pretty old but it's not that bad...
AMD K6-2 500MHz
SOYO 5EMA+ m/board
256MB PC100 SDRAM
3dfx Voodoo3 2000
Windows XP sp1
Just recently it has started rebooting (ie. as if I am pressing the reset button) when the computer is under heavy stress - eg. when gaming or converting mp3s.
Anyone got any ideas as to what's causing this? My first thought is overheating, but why would I start having problems now after years of running stably?