I am trying to fix this desktop computer for a friend. Originally it kept randomly restarting every 5-10 minutes. I tested all the expansion cards, RAM, hard drive, and power supply. All are working perfect in other machines. Tried reformatting and reinstalling Windows, however it would give a stop error at one point or another during the installation process. Always a different stop error. So I put another CPU I had into it and it installed windows fine no problem, and ran perfectly for hours. Then when I’m finishing up installing drivers it restarts again. Long story short the only thing I haven’t tested is the motherboard. Does this sound right? Ive never dealt with a machine that has had a motherboard fail. This is a custom built machine. P4 processor, media center PC. Also tried swapping in new hard drives, new sticks of RAM, multiple times. Any input appreciated. Checked all bios settings as well. And live OS cds dont want to work either.