Windows 10 brightness slider not working [Completely Fixed]

While updating Windows will work to install the latest drivers that could be pending on the updates tray, there are other solutions you can try that are listed below.

Keep in mind that every model of your laptop, as well as operating systems, are different, even as you check on the settings for each fix.

What can I do if the laptop brightness won’t change?

1. Update the display adapter drivers

  1. Right-click Start and click Device Manager.
  2. Expand Display Adapters.
    display drivers Windows won’t let me adjust screen brightness
  3. Right-click on the Display Adapter listed and click on Update Driver Software.
  4. Select the option to automatically search for the updated driver software.
  5. Restart the computer after it’s updated and verified.

You can also try and get the latest drivers from your computer’s manufacturer website and download and install the latest display and chipset drivers.

Install the appropriate drivers missing from your laptop that can cause the brightness adjustment problem. If this does not work, we recommend trying a 3rd party driver updater.

The tool will show exactly what drivers need updating. You’ll have both the option to update several drivers at once, if needed, or choose the Update button next to each driver.

It is designed to do the whole driver downloading and installing job instead of you. This is the best way to avoid permanent damage to your PC by getting the right driver versions.



Have your drivers automatically updated with DriverFix. The tool does all the work for you!

Learn everything there is to know about updating drivers from our complete guide!

2. Enable adaptive brightness

  1. Go to the Windows search bar and type Control Panel.
  2. Select Power Options.
    power options control panel Windows won’t let me adjust screen brightness
  3. Click the Change plan settings link next to your current power plan.
    balanced power plan screen brightness not working windows 8
  4. Click Change advance power settings.
    change advanced power settings how to adjust brightness in windows 7 pc
  5. In the new window click Display to open up the listings under it.
  6. Find and click each of the following: Display brightness, Dimmed display brightness, and Enable adaptive brightness.
  7. Change each of these to the desired settings.
  8. Click Apply.
  9. Click OK.

A feature of the Windows operating system, adaptive brightness uses an ambient light sensor to automatically adjust a display’s brightness to the surroundings. 

3. Enable the PnP Monitor driver

  1. Right-click on Start and select Device Manager.
  2. Click Monitors.
    device manager monitors Windows won’t let me adjust screen brightness
  3. Right-click on Generic PnP monitor to see if it is enabled.
    generic pnp monitor screen brightness not working windows 8
  4. If not enabled, click Enabled device. If it is enabled, disable it.
  5. Click on the Action tab at the top menu of Devices Manager.
    action menu device manager how to adjust brightness in windows 7 pc
  6. Select Scan for Hardware Changes.
    scan for hardware changes can't adjust screen brightness
  7. Run the scan.

PnP stands for plug-and-play hardware devices, that work without having to install a driver. You consider it the generic driver for the display that will automatically get installed by Windows.

4. Update the registry

  1. Right-click on Start icon and type RegEdit.Windows 10 can't sign in with Microsoft account something went wrong
  2. Click on it to open.

  4. Select System.
  5. Go to ControlSet001.
  6. Click Control.
  7. Select the below registry and set FeatureTestControl DWORD’s value data to 0000ffff: Class{4d36e968-e325-11ce-bfc1-08002be10318}000 

If you’re still unable to adjust brightness on your laptop, try updating the registry. Back up the registry before you modify it, then restore it if a problem occurs.

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