Right-click the and select Device Manager .
Because the BCM2045A0 is OEM-specific, the safest drivers come from your laptop manufacturer, even if you have a generic motherboard.
(not the installer).
If the steps above fail, you may need to download the driver manually from a reputable source like the Broadcom Download Page or your PC manufacturer's support site (e.g.,
I struggled to get the (Broadcom) Bluetooth adapter working properly on Windows 11. Windows Update didn’t automatically find a working driver, and the device showed a yellow exclamation mark in Device Manager.