http://answers.microsoft.com/en-us/windows/forum/w indows_8-windows_install/windows-8-pro-shows-test- mode-build-9200-above-the/60468fe9-07db-42ab-bde4- b11f6ba0f029?msgId=92c6827f-51de-4563-9dbe-1e0f9ba f2d0cWindows 8 forces you to use Digitally Signed Drivers. Using an unsigned driver triggers "test mode" in windows 8.