***SOLUTION***
Very simple fix guys. I was having the same issue as most of you here - Xbox controller connected and recognised but not working.
Follow the below steps;
- Make sure the latest Windows update has installed and isn't pending etc.
- Unpair your Xbox controller from your bluetooth settings
- Plug controller in to PC via USB cable
- Download and launch Xbox Accessories app
- You will see a message on Xbox Accessories saying that an update is required for the controller
- Click the the update required button
- One update is complete re connect your Xbox controller via bluetooth
- Done