"Recently (after windows 10 Creators update sometime in May) my pc started to change my gamma setting everytime I start a game in fullscreen, even in windowed-fullscreen. I calibrate and change the gamma setting to the level I want and save it, works fine. All my games looks fine too while running them.
However, as soon as I tab down or turn off the game the gamma setting is reverted back to before I calibrated it, which is incredibly bright and wierd. My games are not affected by this though, so it doesn't ruin my games. "