I've been having this problem for about a month now, my PC will shut down after about 5 minutes without any warning. I've dust it often so dust can't be the problem and the fan seems to work fine. Sometimes after this happens the power supply will be really hot, other times not.
When the problem first started my PC would run for about fifteen minutes before shutting down by itself. I can't do a virus scan or anything due to the limited time.
So the real question is: Is this a hardware problem or a virus? I really need my PC back for school so can someone help me ASAP?