It all started about 2 or so weeks ago, when my comptuer will just randomly restart or shutdown. It doesn't matter if I'm doing anything on it or not. Sometimes the computer won't even boot, everything will turn on, but I see no POST. Also another thing (but seems to not do it as much) is it will boot to the windows welcome screen, but when I click on my name the video will go to stand by and nothing more iwll happen. Does this sound like a power supply problem or something more? Pc specks are in profile.