Windows 11 Brightness Not Working. That way, you can check if the issue is specific to that adjustment setting or if it affects your entire system. When you're prompted by the User Account Control, click Yes to grant admin access.
If this scenario is applicable, uninstalling the application can do the trick for you. That way, you can check if the issue is specific to that adjustment setting or if it affects your entire system. The issue is basic, when i try to increase or decrease the brightness through the slider nothing does happen.
Alternatively, you can modify brightness from the Settings app.
As it turns out, they are missing an option to adjust the brightness of their screen on the Windows Settings app.
In addition to that, no option is available in the action center found on the taskbar as well. Uninstall TeamViewer If you have installed TeamViewer on your operating system, there is a good chance it might be causing the problem at hand. There are a bunch of solutions that are listed in this guide that will help you resolve the problem.