My desktop is acting very abnormally. Every time i boot my desktop, it automatically shuts down. It doesn't shut down as if I pulled the plug, more like if I had pressed the Shut Down Button. My mouse becomes unresponsive and I cannot do anything. I even booted in safe mode and it happened. After it shut down, when I tried to restart it, it would just hang. Just a blank screen on my monitor. Yesterday, my computer was working perfectly fine. Please help! All suggestions are greatly appreciated. Thanks.

Hi have you tried reseating the ram and cards in the PC it could be a contact issue? Do you get any error message at all or beeping noises?