qualcomm atheros ar3012 bluetooth 4.0 interferes with wifi

The only possibly suspicious thing to note in Device Manager is a device under: Universal Serial Bus controllers > Unknown USB Device (Device Descriptor Request Failed).

However, WiFi is working fine which would suggest that the device itself is presumably ok and still present. It is as if the Bluetooth device no longer exists on the system. I have run the 'Scan for hardware changes' in Device Manager but this does not detect anything new. Upon reinstalling the driver Bluetooth is no longer listed anywhere in Device Manager. I proceeded to uninstall and reinstall the Atheros QCA9377 driver as available from the Asus website ( ). I checked in Device Manager and the Bluetooth devices were greyed out though they were not disabled (had to enable 'Show hidden devices' in Device Manager to see the Bluetooth section in the device tree).

The Bluetooth suddenly stopped working this morning and as a result the wireless mouse no longer works (this is how I knew Bluetooth stopped as I was using the machine at the time). I have an Asus T102HA which has an integrated Qualcomm Atheros QCA9377 WiFi+Bluetooth adapter.

Qualcomm atheros ar3012 bluetooth 4.0 interferes with wifi