Use the brightness keys on your keyboard, usually Fn + a key with a sun icon
Open Settings
Go to System
Select Display
Under Brightness and color, move the Brightness slider
Open Action Center or Quick Settings
Use the brightness tile or slider if available
On a laptop, use the battery icon or quick settings panel
In Control Panel, open Power Options
Choose Change plan settings
Adjust display brightness if available
Update your display driver if brightness controls are missing
Restart your PC if the brightness setting does not appear