Everything was fine with v11. I was running Windows 10 Anniversary Edition smoothly. Then I upgraded to v12 and the desk looks like Doublo (you know the big LEGO for toddlers). Configuration/Hardware/Graphics is set to Best for Retina on 15" rMBP. Configuration/Options/Scale To Fit Screen to Auto. In Windows it says "A Custom scale factor is set. Turn off custom scaling and sign out". I did so but after signing in again scaling is still locked. What to do?!