Scenario: You’ve installed Bootcamp on your mac (shame on you), AND updated AMD’s graphic cards, to deal with stability issues.
If, for some reason, your MacBook’s special keys (Brightness, Volume, etc) stop working:
- Boot into your macOS partition
- Open BootCamp Assistant
- Click over Action > Download Windows Support Software
- Save the package to a flashdrive
- Boot back into Windows
- Run BootCamp > Drivers > Apple > AppleKeyboardInstaller64
- Reboot
- Think closely, why, in the name of Satan, you’d need Windows