Game installed with no problem. I was able to launch the game, watch the opening cinematic and get the battlenet login page. All was well. I then noticed that the game was using the onboard video driver. So I switched it to use my dediciated card. Now after I launch the game, screen is blank. I can hear everything and mouse cursor is there, but blank screen. Have tried everything I can think of. Even switched back to onboard video, and screen is still blank. Any ideas?