
Click on ‘Power & sleep’ in the left hand menu, then click on the ‘Additional power settings’ link.Open the Windows start menu and click on ‘Settings’.Method two: change the power plan advanced options This appears to be a bug with Windows 10. If your laptop is connected to two screens – in extended mode – the ‘Change brightness automatically when lighting changes’ option won’t change. Help – ‘Change brightness automatically when lighting changes’ won’t change For desktop computers, the monitor will have buttons and a menu on the front or the side of the monitor. On laptops, these are usually done using buttons on or new the keyboard – sometimes in combination with a Fn (function) key. 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

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.
