I posted a problem a couple of weeks ago that at random, my PC was simply rebooting itself. It was suggested a new PSU may help, which it has to a limited degree, but the problem has now evolved into a reboot whenever the CPU is obviously working relatively hard ( ie after a minute or so of frantic fan activity ). Then it reboots all over again. So, after a new graphics card, and a new 500W PSU, the problem still persists.A virus scan never completes past 10% so haven't been able to see if a virus is the culprit either! Please H_E_L_P!!