Now, your PC will use your internet connection to download the drivers that are necessary for proper functionality. Next, click on Search automatically for updated driver software.Select Update Driver Software from the menu to fix the Windows 10 brightness control not working issue.To check, open Run > Type dxdiag and press Enter > Go to display tab. Click on it to expand and right-click on the GPU that powers your display (internal or discrete).
Most of the time, the Windows 10 brightness problem can be solved by simply updating the GPU drivers. A buggy GPU display driver living on your machine could be the reason why you can’t adjust brightness on Windows 10.
