http://www.poegasm.com/computer-lock/
Why does my computer lock up or reboot when the computer is moved or even knocked slightly?
my pc will lock up or reboot if i sometimes just knock the table it is sat on or if i plug an audio cable in or out at the back, what is the most likley problem to check for?
it sounds like a piece of hardware in your computer is touching something that it shouldn’t
involuntary shutdowns will also occur when pieces of hardware are not fully secure
if the computer doesn’t move at all and it shuts down when you plug in an audio cable, id say the circuitry on your mother board is going bad for some reason