Windows Brightness Problem Not Working or Changes Automatically [Solution]

Windows Brightness Problem Not Working or Changes Automatically [Solution]
When you cannot change the brightness on your Windows 10 desktop PC or laptop, the problem can be software- or hardware-based. Here's how to try to get it working again.
The correct brightness of your display is crucial when using a computer. Watching a movie, playing video games, working, or creating art all rely on a good monitor.
Do you use features such as Night Shift that change the brightness of your display depending on the lighting of your environment? These all depend on your monitor’s brightness control.
Issues addressed in this tutorial:
windows brightness not working or changes automatically
windows brightness not adjusting
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windows changes brightness automatically
windows brightness button not working
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why do i not have a brightness slider windows 10
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Some Windows 11/10 users have reported that their screen brightness changes automatically or does not work properly. They can’t adjust the brightness. If Windows 11/10 Brightness slider is not working or changes automatically on your computer system, then this post will help you troubleshoot & fix the problem.
Microsoft has made it quite easy to change the brightness setting in Windows. But the feature often breaks owing to faulty software updates, graphics drivers, or hardware issues.
Fortunately, fixing the brightness setting only takes a couple of minutes if there are no hardware issues involved.
This tutorial will apply for computers, laptops, desktops, and tablets running the Windows 10 and Windows 11 operating systems (Home, Professional, Enterprise, Education) from all supported hardware manufactures, like Dell, HP, Acer, Asus, Toshiba, Lenovo, Alienware, Razer, MSI, Huawei , Microsoft Surface, and Samsung.