I had a simuliar problem, except mine would re-boot after I was on-line for a while, I would get the dredded error box and how it wanted to send it to microsoft for eval. I found out that I had cheap SDRAM. I had to run the good stuff in my OEM Compaq. I have currently 512 Mg of Hyundi PC133 SDRAM and not a glitch. I even found that now that I have removed the cheap stuff the puter handles like a Cobra instead of an Edsel... How this helps out....