Today my PC decided to start shutting itself off. It doesn't just abruptly shut off, but actually powers down. I get the Windows 7 "Shutting Down" message and tone. I monitored my temps and they're around 27-30C. I opened it up, dusted, still shutting down on its own. I was thinking it might be the PSU failing but the MOBO light remains on. Sometimes it shuts down within seconds of reaching Windows. There are no error messages, no beeps, and no automatic reboot. Specs wise Im running Windows 7, i5-750 (not OCd), Samsung 256GB SSD, 8GB Mushkin Silver Stiletto RAM, NVIDIA GTX 760 and a 550w Corsair PSU. I did find some drivers with errors, but on the DVD drive. I uninstalled them and am going on 45min without a shut down. Not sure if it's fixed or just a longer than normal pause between shut downs. I'm super confused with what's going on. Any insight would be great. Im stumped!