For me Chispy's post above is easier to do.. First make bootable drive with your Win7 ISO, then download utility from Gigabyte (Windows USB Installation Tool - B17.1116.1) and run it, make sure you checked "Add USB Drivers to an offline Win7 Image" and choose your bootable drive to add the driver.. After the process done, make sure you locate your bootable drive at USB ports that are located above the HDMI and try boot into it