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My Macbook Pro is the model of later 2015 with AMD R9 M370X.
I installed windows 10 through bootcamp.
By now, all the drivers of bootcamp is up to date.
everything works well in EI Capitan, while in Win10, I can not adjust screen brightness, but the keyboard backlight adjustion works. It's too bright for me to work for a long time.
MacBook Pro with Retina display, OS X El Capitan (10.11.5)
No worries. Post back when you are ready.
What is the possibility of removing/re-installing Windows?
Do it only on one system, preferably the Intel GPU one first.
Rebuilding machines is an arduous task. If you run into any issues during this process, please post back and I can try and assist. Good Luck.
Can not adjust Brightness in Windows 10
