Currently, I've noticed problems with my PC.

Started off by inserting a DVD into my slot load DVD drive (I have two). All of a sudden, the computer powers off, as if it had been unplugged. I pressed power on to repower, no luck. I flicked the switch on the back, waited, and tried again. It started then shut off. I troubleshooted for awhile unplugging power from drives to see if it was a PSU problem. Eventually it worked ok and ran smoothly until I tried using the drive again, which caused the same problem. I got the system to run again and the problem showed up three times in other...