So about 2 months ago I thought I was smart or something and tried to overclock my processor through the BIOS. Fried it, of course. Took it into CompUSA to see what kind of damage I did and the processor/motherboard were both fried and needed to be replaced. So they did that (Athlon64, MSI K board). But then the system crashed or reset when I brought it home. Reinstalled windows to no effect. Took it back to Compusa twice where they could not get the system to crash/reset no matter how hard they tried. (So they say.) I've tried different monitors, power cords, rooms in the house, without the surge protector, reformatted the hard drive and started with a fresh copy of windows..all to the same effect. Ran Norton's virus check (updated), windows defender, and spybot. When it crashes the monitor goes black, but the fans in the CPU are still running. Turning the monitor on and off will only show a message no 'signal to monitor'. Moving the PC into the basement where it's much cooler (where I have my old PC running just fine along with the wireless router) seems to help but it still crashes. I'm thinking graphics card, but maybe the RAM. Maybe the power supply. Or the new motherboard/processor. No idea really.