Alright, I'm using version 3.4.1 Professional on Windows 7 64. After cleaning in safe mode, I restart the computer screen hangs on the starting windows screen. I hear the windows logon sound but see the logon screen. It just stays stuck all black with the frozen windows symbol. I can log into safe mode but that's it. I was able to install the drivers through the device manager in safe mode for those who may have run into this problem. I have an ATi HD5870 for reference.