Okay... it happen twice... When I play game more than 6 hours, it no problem But... if I left my computer on for more than 15 mins for lunch and dinner, my screen get flicker and around 30 red dots all over the screen. The 3D get stretch and strink little. So how I stop that if I want to leave my computer on more than 15 mins without touch keyboard and mouse.
you can turn it off by going right click on your desktop and then properties and then go screensaver taband set it to blank.