I need some help. For no reason I can find, I will be on my PC and all the sudden it will shut down just like I went to start tab and clicked shut down computer. I don't think it's my power supply. It's a PC power & cooling unit 750 watts and is built like a sherman tank. It's not like a lost power shut down, but more like a sign off and shut down kind of issue. The the pc just turn off and I have to hit the front power button to boot back up. WTF? Maybe my APC battery powered surge protector?