
When you upgrade from Win 7 or 8.1 or update from a different version like 1511, the likely cause could be a driver problem. Update Bluetooth Keyboard Drivers for Windows 10
Make sure Bluetooth is enabled on your PC. Bluetooth Keyboard not working after Windows 10 Creators Update. Bluetooth Keyboard is paired but not working. Update from Windto 1703 or similar version. Bluetooth Device doesn’t appear and Unknown Device also doesn’t appear. Bluetooth Keyboard device doesn’t appear in Device Manager and shown as Unknown Device. Bluetooth Troubleshooter to the rescue !.
How to Connect your Bluetooth Keyboard on Windows 10?.
Few other Fixes to do if this is not working!.Top Fix to Solve Bluetooth KeyBoard not working in Windows 10.Update Bluetooth Keyboard Drivers for Windows 10.