It's never done this before. I have a Windows 7 operating system and I have not installed a virus. I believe it could be a overheating issue as the computer is 3 months old. My room is pretty dusty and there's dust on the carpet under the power supply where the PC lies. Is it possible to just dust the dust from the PSU out from the bottom with a duster, and then do the rest of the PC? Would that solve my issue? I'd really like to get back to gaming, as my PC has never done this before. If you need more information from me, ask. Thank you.