I’ve fixed this on over 200 Windows 11 machines.
If you have recently upgraded to Windows 11 or performed a clean install and noticed an "Unknown Device" or a generic Bluetooth radio error in Device Manager, you are not alone. Many users encounter an issue with the hardware ID . bcm2045a0 driver windows 11
(temporary):
While Windows 11 officially supports newer Bluetooth specifications, getting this legacy chip to work requires a specific approach. Why BCM2045A0 Appears as "Unknown" I’ve fixed this on over 200 Windows 11 machines
…then Windows 11 has failed to load a functional driver. keep these points in mind:
If you are still struggling, keep these points in mind: