I have an up todate macOS Sierra rMBP with maxed out specs and the AMD Retina GPU from mid 2015 (last model before current Touchbar MBPs). Having installed Windows 10 Home using Bootcamp Utility today, initially all worked well until I used the Apple Update Tool in Windows to update to Bootcamp 6.0 (current version). This disabled the brightness setting, not only on the Keyboard (all other F buttons such as keyboard backlighting, volume etc still work) but also it removed the ability to adjust brightness from the Windows settings. I can tick and untick the automatic brightness adjustment in Windows 10, but this does not do anything. I also downloaded the Bootcamp AMD drivers from the AMD website, again no change. I am a bit lost and cannot imagine that there is no solution.... Any ideas?