ATT Freezes up my whole FRESHLY installed windows 7 Ultimate 64Bit desktop system when i try to start it up. When i start it up on startup, you can imagine i can't even do anything. Can someone tell me how to solve this? Device using: Ati Sapphire HD 7970 Overclocked 3GBs Tried using ati tray tools 1.05(No freeze, but Access Violations and "Could not load low level driver" HELP PLZ!