Hello! I need your suggestions about this issue that is driving me crazy. I built a PC for my parents: ECSP4800-Pro Celeron D 2.53Ghz 250GB HDD IDE WD 1GB DDR PC 3200 EZMAX PSU 400w The problem is that is suddenly restating itself with aparently no reason at all. So, I check the Temps and they are ok, all below 40c, I run memtest+86 to check memory and have no problems, I tried a different PSU (an Antec 550w) and still do the same thing. Im really running out of options, what could it be? sometimes I just turn on the PC and when the Screen of windows XP is loading just flashes and restarts again, sometimes my parens are just surfing the internet and the restart suddenly, sometimes is idle and restarts, and once I was running Prime95 and voila restart! any ideas about what I'm missing here.