The ‘Display’ menu should be selected on the left, if it is not – click on ‘Display’.In the settings window, click on ‘System’.Open the Windows start menu and click on ‘Settings’ (a cog icon).Here’s three ways to disable the automatic screen brightness feature. This feature can be more annoying than helpful, either leaving your screen too dark or frequently adjusting the brightness levels. For computers with a light sensor, typically laptop computers, Windows 10 has the ability to automatically adjust the screen brightness depending on the ambient light levels.