Download the gbu521 driver here. This is the IOGEAR GBU521 Bluetooth 4.0 USB driver Windows for a XP, Vista, Win7 computer. This is both the drivers and the utility for the Iogear GBU521 Bluetooth Driver. The Hardware ID has been added to the list below and the driver is attached below that. The Hardware ID’s … Continue reading IOGEAR GBU521 Bluetooth 4.0 USB Driver