The Unknown device with hardware ID IUSB3\ROOT_HUB30&VID_8086&PID_8C31&REV_0004&SID_20498086, is actually an Intel(R) USB 3.0 Root Hub. The driver can be downloaded from the Intel website (sorry, I don’t have the link. If you find the link, please share it), or the driver CD of an Intel DH87MC or Intel DH87RL motherboard.