Is Brightness slider or control missing? If Brightness control is not working or there is no Brightness slider in Windows 11 Settings, see this post.

Although Windows 11/10 enables Battery Saver automatically when it reaches 20%, there is no option to change the percentage of the brightness of your screen.

Arguably, Microsoft jumped the gun with Windows 11, which had its share of issues and bugs at launch. Here's how to fix the most common issues with the OS.