If you are using either an AMD graphics card or the HD graphics of Intel, you may have to disable the power-related options in the GPU settings. The problem might be due to the Graphics card settings.
Option 2 – Try disabling or turning off the corresponding options in GPU settings
The first thing you can do to resolve the issue with Adaptive Brightness is to run the Power Troubleshooter as the problem could occur due to some conflicted power settings. Option 1 – Try to run the Power Troubleshooter If this issue happened right after you update or install Windows 10, then read on as this post will give you a couple of options you can try to resolve the problem. However, there are times when it does not work or it doesn’t turn off when you want it to. It helps you get the brightness automatically based on the light around your computer. The Adaptive Brightness setting in Windows 10 is a useful setting you can use in adjusting your computer’s brightness. What to do if Windows 10 Adaptive Brightness is not working or turning off