Save yourself the trouble of squinting all day
How to Adjust Screen Brightness in Windows 10
One of the best ways to prevent or reduce eyestrain and headaches while using the computer is to set the correct screen brightness.
For many Windows 10 users, using the brightness adjustment keys on their keyboard is a faster way to manually adjust the brightness level on their PC.
If for some reason the keys aren't working properly, there are other methods you can use to adjust the brightness on your Windows 10 PC.