Make sure you are downloading the driver, not the Wi-Fi driver.
If the driver does not come with an automatic installer, you can install it manually through the : Bluetooth Module Atheros Ar5bbu12 Driver
Here are some common issues you might encounter with the Atheros AR5BBU12 driver: Make sure you are downloading the driver, not
: Specialized firmware patches within the driver resolve connectivity drops and pairing errors common with generic drivers Bluetooth Module Atheros Ar5bbu12 Driver
A defining technical feature of the AR5BBU12 is that it operates as a USB-based Bluetooth device DeviceHunt Hardware Interface
driver is most apparent during major OS transitions. Many users encountered issues when upgrading from Windows 7 to Windows 10 or 11, as the legacy software provided by the manufacturer (Qualcomm Atheros) was sometimes discontinued or deemed incompatible.