, and choose "Search automatically for drivers." Windows may find a compatible generic driver from its own library. Roll Back Driver:
Modern Windows blocks unsigned drivers. Since many AR5BBU12 drivers are community-signed: Bluetooth Module Atheros Ar5bbu12 Driver
Are you currently seeing an error in your Device Manager, or is the Bluetooth toggle missing from your settings? Atheros Bluetooth Driver for Windows 10 (64-bit) - Desktop , and choose "Search automatically for drivers
Why? Because the AR5BBU12 is not a separate Bluetooth chip. It is a combo Wi-Fi + Bluetooth module built around the Atheros AR9285 (Wi-Fi) and a separate USB Bluetooth controller (often a Cambridge Silicon Radio, or CSR, chip) on the same board. Atheros Bluetooth Driver for Windows 10 (64-bit) -
Qualcomm does not provide direct driver downloads for end-users. You must download the driver from your specific laptop manufacturer's support site using your serial number or model name. Microsoft Learn