I have a G19 and a mouse. And both of these wont work when i try to do a installation of Windows 7. It will get up to the first dialog screen but i cant go any further due to the devices not working. In the bios the USB legacy is enabled. and the mouse also works in the bios. This the MB i have. https://www.asrock.com/MB/Intel/Fatal1ty Z270 Gaming K6/index.asp Anyone with suggestions i should try. Thanks.