Fix: ‘Brightness Function Key Not Working’ issue

In this article we will discuss about how to Fix ‘Brightness Function Key Not Working’ issue. When the brightness of your laptop or PC monitor is too low, you may get headaches or eye strain. You can easily fix problems like this by adjusting the brightness by pressing the brightness function key. After updating to the latest build, some Windows users have found that they can’t use the Function keys to change the brightness. Most of the time, this problem is caused by wrongly set up settings, problems in the BIOS settings, or a missing driver.

Things get tricky, though, if this key no longer works or has stopped working. You can change the brightness of your computer screen in a few different ways, but the easiest way is to use the function keys. Depending on the brand of your PC or laptop, the function keys you use to change the brightness of the screen are different. This article will tell you how to Fix ‘Brightness Function Key Not Working’ issue on a Windows 11/10 device. If you want to know more information about this Visit Official Microsoft Support site.

Run the Keyboard Troubleshooter

Windows 11:

1. Right-click on the Start menu.
2. Start the Settings app.
3. Scroll down on the Settings app’s right side.
4. Find and click on the Troubleshoot tab.
5. Click on Troubleshooting steps.
6. Windows 11 will show a list of all the troubleshooters it has.
7. Find the troubleshooter for the keyboard in the list.
8. Click the Run button next to “Keyboard” to start the Keyboard troubleshooter.

Windows 10:

1. To open the Settings app, press the Windows key + I.
2. Choose Update and Safety.
3. Choose Troubleshoot from the menu on the left.
4. Click More troubleshooting steps.
5. Find the Keyboard Troubleshooter and run it.

Reinstall the Keyboard Driver

1. Click on “Device Manager”.
2. Add more to the Keyboards section.
3. Right-click on the driver for the keyboard.
4. Choose Remove device.
5. Turn on your computer again.

Reinstall the Display Driver

1. Open Device Manager and then expand the Display Adapters tab.
2. Select Properties by right-clicking on your graphics driver.
3. Click Uninstall Device on the Driver tab.
4. Restart your PC.
5. When you restart, Windows will install a basic driver.
6. You could also use a program like DriverFix to find the best drivers for your computer and install them automatically, or you could download the driver from the manufacturer’s website and install it yourself.

Uninstall the last Windows Update

1. From the Start menu, go to Settings.
2. On the left, click on Windows Update.
3. Click on Change Past.
4. Scroll down to Related settings to find Uninstall updates.
5. Right-click on the update and choose “Uninstall.”

Enable Generic PnP Monitor Driver

1. Click on “Device Manager“.
2. Add more to the Monitors section.
3. Right-click the driver.
4. If the driver is off, click the “Enable device” button.

Install Microsoft Basic Display Adapter

1. Click on “Device Manager“
2. Open up the section on “Display Adapters“.
3. Right-click on the display driver and then click “Update driver“.
4. Click “Look for drivers on my computer“
5. Click “Let me choose from a list of drivers that my computer has“.
6. Choose the “Microsoft Basic Display Adapter” option.
7. To install the driver, click “Next” and then follow the on-screen instructions.

Run the Hardware and Devices Troubleshooter

1. Look in the Search menu for the Command Prompt.
2. Select As Administrator (Run as).
3. Copy and paste the following command, then press Enter:
   • msdt.exe -id DeviceDiagnostic
4. Follow the steps on the screen to get the troubleshooter to work.

Why isn’t my Brightness button working on Windows 11?

There are many things that could be wrong with our Windows 11 brightness button. A bad driver is the main cause of the problem. This problem will happen if your monitor and display drivers are broken. One more reason is that your keyboard is broken. Either your keyboard is broken or the driver for it isn’t working right.