By default, Windows 7 automatically blocks users from installing unsigned drivers to the system. Although intended to be an added security feature, this setting makes devices or peripherals that you'd like to connect to your computer completely useless. In order to proceed with the installation of an unsigned driver, you must first disable a driver's signature verification. This article will teach you how.
bcdedit /set nointegritychecks ON. If the Run command is unavailable in the Start menu, please refer to this FAQ.
bcdedit /set nointegritychecks OFF.