Hi my problem is that a few days ago my computer stopped shutting down. Everytime i goto (Start --> Shutdown --> Shutdown) my computer doesnt shut down it just restarts again. So my shut down button and restart buttons all restart my computer. i dont know why its happening, i was playing around in the BIOS a few days ago, but i dont think i did anything. To clear things up i even set Bios settings to default. could this be a mother board problem? do i need a new motherboard? hmmmm can anyone help?