When I play games it just crashes, sort of happens when I do an action, take skyrim for an example, I press J to open my quest log then press tab to exit AND THEN BAM computer shuts off and a short beep plays simultaneously. Monitor loses signal, short beeep and the whole PC shuts off as if I forcefully turned it off. This can happen when I'm browsing. It happens sometimes when I get to the screen where I can press a button to enter the BIOS.