Apple Magic Keyboard Media Keys not working on Windows 10 ? How to enable them?

Hi guys, I have this big problem with the Apple Magic Keyboard! I simply cannot use any of the media keys (brightness, volume, etc.) on Windows.

I'm not sure what I'm supposed to do here. The main parts of the keyboard works perfectly but nothing I'm doing is enabling media keys.

I installed the Apple Bootcamp drivers 5.1.6160 (only the AppleKeyboard64) to no avail. The Keyboard option 'Use all F1, F2, etc. keys as standard functions keys) also does nothing. If I press F1 (which is also the brightness down key), the help program on Windows opens up. Using the Fn key modifier does not change this result.

What exactly do I need to do to get this work? This keyboard is nice, but the limited functionality is pretty annoying.

Thanks in advance!

System Specs:

• Apple Keyboard a1644
• Windows 10 Pro
• Apple Bootcamp Drivers 5.1.6160
• Intel Wireless Bluetooth (Intel Wireless 7265)