In this case you will need to use the manual brightness adjustments. It is possible that Windows 10 support is not provided. If you’re sure your computer does have a light sensor – try checking the manufactures website for the correct driver and/or software package. If you don’t have the ‘Change brightness automatically when lighting changes’ option it’s likely your computer does not have a light sensor and therefore does not have the automatic brightness feature. Help – I don’t have the ‘ Change brightness automatically when lighting changes‘ option

Un-tick ‘Change brightness automatically when lighting changes’.

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.

Windows resize when monitor turned off