Fix Screen Brightness Not Adjusting

Last updated: March 5, 2025

Fix missing or greyed-out brightness slider, non-responsive brightness keys, and adaptive brightness issues on laptops and desktops.

Overview

Brightness slider missing or not working? This guide covers display driver fixes, adaptive brightness, monitor drivers, and Fn key configuration.

What this helps with

What to expect: Easy difficulty • usually about 10-15 minutes.

This is one of 41 Hardware Troubleshooting fixes in the WindowsHelper library. The full step-by-step fix lives in the WindowsHelper app.

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