I would try and clear the cmos. if your keyboard works in the bios screen..it lit but not in windows then it a windows issue..missing drivers or tried to use drive that had windows on it. if it locks up in the bios then you want to bare bone the pc. one stick of ram.no hard drives and check that the usb front header is on right. on the mb vendor web page there a bios update for usb device and an i-rock usb keyboard..so they know they have issue with usb device..i would try another keyboard.