ASUS K43S

My laptop's bluetooth adapter (Qualcomm Atheros) won't start when i don't have internet connection. It was working fine until i updated my OS from Windows 7 to Windows 10. I tried Fn F2 to enable the device but it automatically stops. I tried updating the driver online but a dialog box will only pop up stating that "windows has determined that the driver software for your device is up to date". I also tried uninstalling the device from device manager and let windows find the driver but it still doesn't work...Can anyone share some light about this....thanks...