Hi, when i try to play a game(warcraft3) that required full screen to run, it crashed after a few minute., no picture at all but sound. i have been tried to click some window command like alt+f4 and alt+tab, nothing happen. at the moment, all i can do is force to shutdown. and then i played the other game(NFS Shift) in window mode, it runs perfectly. my computer's specs: Intel Core i7 860 8GB ram Ati Radeon HD 5770 Window 7 home premium anyone could help me?