Whenever I try to shutdown my pc by using sudo shutdown -... now (it doesn't matter what I fill in for the ...), it always shutdowns down for about 3-4 seconds, and than just powers up again. I'm sure WOL is disabled, and just to be sure I tested it with ethernet cable unplugged. It's a fresh install of ubuntu server 14.04. It's also a new pc so I do not have any prior experience with it. Any help would be very much appreciated