After reboot, check Device Manager. The yellow triangle should be gone. Under Bluetooth, you should see:
No. It is Bluetooth 2.1+EDR or, in some revisions, Bluetooth 3.0+HS. It does not support Bluetooth Low Energy (BLE). Do not try to force BLE drivers. Bluetooth Module Atheros Ar5bbu12 Driver
If you followed Part 4 and Bluetooth still doesn’t work, try these advanced fixes. After reboot, check Device Manager
The AR5BBU12 is an older Bluetooth 2.1 + EDR (Enhanced Data Rate) device. It struggles with high-bandwidth tasks on modern networks. No. It is Bluetooth 2.1+EDR or
The single biggest complaint about the Bluetooth Module Atheros AR5BBU12 is that Microsoft’s generic driver or the outdated OEM driver often does not work correctly.