Press the brightness keys on your keyboard, usually Fn + a key with a sun icon
Open Settings
Go to System
Select Display
Move the Brightness slider to the left
Open Action Center or Quick Settings
Use the brightness slider if available
Open Control Panel
Go to Power Options
Adjust the screen brightness under your active power plan
Use your monitor’s physical buttons or on-screen menu if you are using a desktop monitor
Update your display driver if the brightness option is missing
Restart your PC if the brightness setting is not working