Im getting this graphical error at random. In-game, it renders me unable to see sometimes because it will cover the entire screen. It forces me to alt-tab out and back in, which is very frustrating especially during boss fights where pausing for 3 seconds can cost you your life. So far the only way I've found to make it go away is to alt-tab out of the game and back in, but it always eventually returns, usually very quickly. Ive tried everything I can think of with no success. Any help or suggestions regarding my issue would be greatly appreciated. My video card is the Nvidia GTX 660 Driver version 327.23 on 64 bit Windows 8.