While the driver is the software interface, its purpose is to unlock the capabilities of the underlying hardware. The "bt-bu1" hardware it's associated with generally includes:
If Windows cannot find a driver, you may need to download it from a third-party source like the Driver Scape download center , which hosts various versions for Windows XP through Windows 10. bt-bu1 driver
sudo modprobe btusb
This occurs when there is a driver conflict, usually because Windows is trying to force an incorrect generic Microsoft driver onto the Realtek/Broadcom hardware. While the driver is the software interface, its