XBCD allows using the original Xbox Controller S on Windows. Windows 10 doesn’t allow installing unsigned drivers and XBCD has an unsigned driver. In order to instruct Windows to allow the installation you’ll have to:

1. Press Start
2. Click on Power
3. Hold down Shift and press Restart
4. Navigate to Troubleshoot -> Advanced options -> Startup Settings and press Restart
5. Wait for Windows to restart and when prompted press 7 for Disable driver signature enforcement and wait for Windows to come up
6. Install XBCD and allow it to install the driver
7. Restart