display brightness windows 10 not working

In the next screen, select Microsoft Basic Display Adapter from the list under Show compatible hardware section.

Then choose the option 'Let me pick from a list of drivers on my computer'.

In the ensuing interface menu, choose Browse my computer for driver software.

Right-click on the installed display drivers, and choose Update Driver Software from the context menu.

Scroll down to the Display Adapters entry in the device list and expand the option.

Go to Start Menu > Search and type 'Device Manager' and then launch the Device Manager app.

In this case, you could try the following alternative fix:

If the issue still persists, it means the latest video drivers are still unavailable from the card manufacturer. Once the drivers are installed successfully, you will see a notification message confirming the same along with the hardware details pertaining to the driver.Windows 10 should automatically download and install the necessary display or video card drivers via the detected internet connection.Select Search automatically for updated driver software in the resulting interface menu.Then select Update Driver Software from the ensuing context menu.Just expand this option and right-click on the installed display driver.Then launch the Device Manager app and navigate to the Display adapters section.Go to Start Menu > Search and type Device Manager.Steps to fix Windows 10 brightness control How to fix Nvidia driver issues after upgrade.How to fix 'This app has been blocked for your protection' error.How to fix sound issues after free upgrade.More Windows 10 troubleshooting tips and guides:

Display brightness windows 10 not working