Scroll down to Display, then under Enable adaptive brightness, switch it off for both the battery and plugged in modes. Click on Change plan settings next to your active power plan. Go to Control Panel, Hardware and Sound, Power Options. Click/tap on Display on the left side, and check (on) or uncheck (off) Change brightness automatically when lighting changes for what you want on the right side under Brightness and color.Open Settings, and click/tap on the System icon.To Enable or Disable Adaptive Brightness in Settings How do I stop Windows 10 from dimming the screen? How do I change the auto brightness on Windows 10?.Why can't I change brightness on Windows 10?.

How do I stop my screen from changing brightness?.Why does my laptop screen dim randomly?.How do I stop Windows 10 from dimming the screen?.When the battery falls below 20%, Windows will automatically lower the screen brightness, which helps reduce battery consumption. Windows 10 includes a new feature called Battery Saver that can extend battery life of your laptop or tablet.

Dim screen windows 10