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Fix: Windows 10 Brightness Control Not Working Issue!
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Fix: Windows 10 Brightness Control Not Working Issue!

Windows Brightness Control slider not working? Here are the fixes!

Windows Brightness Control slider is one of the very important utilities for Windows users. If it is not working properly, that needs to be fixed immediately. The brightness control lets you prevent your eyes from unnecessary strain and saves battery life while working on a PC for long hours. You can always change the brightness settings as per your needs. However, sometimes you aren’t able to modify the brightness. If you are facing the same problem, this guide is for you.

Usually the brightness control not working error arises because of the display drivers or the Windows power settings. Also, the first trick to apply when you aren’t able to control windows brightness includes restarting your PC or checking for Windows update.

Even after trying these basic ways, you can’t use a brightness control slider, check out the ways explained below.

How To Fix: Windows 10 Brightness Control Slider Not Working!

In this section, we’ll cover:

  • Update Display Adapters Drivers
  • Enable Adaptive Brightness
  • Enable PnP Monitor
  • Update The Registry

Method 1: Update Display Adapter Drivers

The first and the foremost ways to fix the brightness control not working on Windows 10 is by updating the Display Adapter. Here’s how to do this manually:

  • Open Device Manager from the Start Menu.

device manager

  • Head to Display Adapters and click the arrow beside to expand the menu.
  • Now right click on the available driver and choose to Update Driver.

Update Display Driver

search for drivers automatically

  • Wait for the process to finish. Once done, restart your PC to apply changes.

Alternatively, we always recommend you to have an automatic Driver Updater installed on your PC so that you get timely updates of any outdated or corrupted drivers that need to be fixed. This will prevent you from such random errors. We suggest using Smart Driver Care, a robust driver updater utility for your Windows PC. It takes utmost care of your system drivers and lets you fix all the corrupted or outdated ones in a single click. Here’s how to use Smart Driver Care:

  • Download and Install Smart Driver Care from the link below.

Click Here to Download Smart Driver Care

  • Launch the application on your system.
  • On the first screen, you’ll see a Scan
  • Click on it and wait for the scan to finish.

Smart Driver Care-2

  • You’ll then see a list of corrupted and outdated drivers.
  • Click on Update All to update all of them at once.

Smart Driver Care-1

  • Or you can choose any particular driver and click on Update Driver located beside it.

smart driver care

  • Restart Your PC to apply changes.

Not only this, Smart Driver Care gives you the ability to backup and restore backed up drivers in case something happens accidentally.

To know more read the full review of Smart Driver Care

Method 2: Enable Adaptive Brightness

To enable Adaptive Brightness on Windows, follow these steps below:

control panel

  • Navigate to Hardware and Sound.

control panel 1

  • Click on Power Options.

control panel 2

  • On the next screen, you’ll see Change plan settings highlighted in blue colour. Click on it.

control panel 3

  • Then, click on Change advanced power settings.

control panel 4

  • On the new window, click on Display to open further options.

control panel 5

  • Change the available options to the desired settings.
  • Click Apply and then OK.

Method 3: Enable PnP Monitor

If the last method doesn’t work, you can try enabling the PnP monitor. Here’s how to do this:

  • Open the Run window by pressing Win+R key together. Now, type in devmgmt.msc to open the Device Manager on Windows.

run window 1

  • Click on Monitors and expand the menu.
  • You’ll see a Generic PnP monitor. Right-click on it to check if it is enabled.
  • If not, click on Enabled device. If it is enabled, disable it.
  • Now, head to the Action tab at the top of the Device Manager.
  • Then select Scan for hardware changes.

Enable PnP Monitor

  • Run the scan.

That’s all.

Method 4: Update the Registry

Last method in our guide to fix brightness not working on Windows is through Registry update.

Note: Please note that updating Registry involves serious changes to your PC. If not done correctly, serious problems may occur.

To continue updating the registry, follow the steps below:

  • Open Run window using Win+R keys together. Type in regedit to open Registry Editor.

run window 2

  • Click System > ControlSet001 > Control.
  • Now, Select Class{4d36e968-e325-11ce-bfc1-08002be10318}000.

registry edit

  • Then set FeatureTestControl DWORD’s value data to 0000ffff.

This should solve your problem of brightness not working.


Although updating the display driver using either manual method or using Smart Driver Care will fix the error of brightness not working. If in case, this doesn’t fix, there are other ways listed in the article. You can try them out and let us know if you have any queries or suggestions.

Keep reading Tweak Library for more such content.

Recommended Readings:

Simple Ways To Open Windows 10 Registry Editor

How To Scan Documents On Windows 10

Have You Tried These Advanced Power Setting Options on Windows 10?

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