Borderlands 1 Causes My Gaming PC To Sieze Up Until Restart

I made this thread on the steam forums already and no one on there was able to help me so I am taking it to the gearbox forums. Whenever I close Borderlands 1 on my computer, it crashes my computer. New programs won’t open and new steam games will not open until I restart the machine. Other games such as League of Legends that have no ties to steam do not open either and youtube videos will load, but freeze until I restart the computer as well. I am able to skip through the video and see it frame by frame but it will not play. I have checked my computer for viruses, I have reinstalled Borderlands 1, and I also have verified the game files via steam and everything checks out, however the problem still persists. If it matters, when I close Borderlands 1 the my screen will go back to my desktop and then go black for one second and then back to the desktop. When the screen flashes like that the problems begin. Any help would be greatly appreciated smile

Asus Rog G750 with an 860m graphics card, Intel I7 processor running on Windows 8