I did system restore did not help. Is this hardware issue?
Corebook Pro 13
I managed to solve the problem myself. The issue is the driver becomes corrupt.
Since wifi and bluetooth are the same module you have to go to device manager and find the “network adapters” and uninstall “bluetooth device” from there. You need this for the windows to reinstall the driver automatically after restart. Once you restart, the devices (in my case) will appear again in the devices manager and appear as paired in the panel, which I was unable to unpair. To unpair them “manually” you will have to use command line, here’s how:
This can be obtained in Control Panel\Hardware and Sound\Devices and Printers in the properties of the device. It often appears under the name of “Unique identifier”
btpair -u -b xx:xx:xx:xx:xx:xx
This will unpair (-u) the bluetooth device with the xx:xx:xx:xx:xx:xx MAC address
Done! It is not difficult at all.