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How to Change the Brightness of Screen in Windows 11
Step 1: Open the Windows Settings app. Step 2: When it opens, go to the sidebar and click "System," then "Display." Step 3: Scroll down to the section titled "Brightness & Color." Step 4:...
If your PC is connected to a monitor, you are not able to adjust brightness on windows. You have to adjust brightness on monitor by using the buttons on the monitor directly(remember to turn off eye protection mode).
If you are using laptop, try using key pad to adjust brightness.