Twice today my pc has crashed. The screens go black and read "no signal", a few seconds later the pc starts rebooting, I choose "start windows normally" and when the desktop shows, all the icons are moved around. First time they were moved to the right side of the screen, second time half were on the left screen and half on the right screen. First crash I was playing BF4, second crash I was just on the web browser (Chrome). Any idea what could be causing this?