I am having the same issue. I just built this PC for the office, I have only installed Windows 7 Home Premium 64-bit (clean install - not update). Microsoft Office 2007 Pro. And Malwarebytes. All Windows updates have been done. As soon as the installer tries to do its pre-installation scan I get the BSOD around 4% in. Malwarebytes is not running, so I am not sure what is causing this crash. Any suggestions?