Could a defective CPU cause my computer to crash randomly? I had a brand new AMD CPU installed by Best Buy a few months back. When I got it home the computer overheated in a few seconds. I took it back and come to find out they had put the water cooler in wrong. The overheating stopped but ... sometimes in a few minutes or other times in a couple of days the computer freezes up, rock hard. I have to do a hardware reset to get it to reboot.