How to Fix Screen Brightness on Windows 10 in Laptop and PC

Microsoft’s most stable operating system is Win10. In this article, we’ll solve the Windows 10 Screen Brightness problem.

How to Fix Screen Brightness on Windows 10 in Laptop and PC

How to Troubleshoot Windows 10 Screen Brightness

You may often experience a screen brightness problem with Lenovo-branded PCs and Laptops. For example, the Lenovo Z500 and Lenovo Z580 series have screen brightness issues. You may also encounter this error in the Lenovo IdeaPad series.

If you cannot adjust the screen brightness on Windows, you must first update your computer’s video card drivers. If the screen brightness still does not change after updating the video driver, you may need to adjust the Regedit settings.

The most common computer brands with the screen brightness problem are;


Not only will you experience this problem on Windows 10, but you may also encounter this error in Windows 7, Windows 8, and Windows 8.1 operating systems.

Laptop users can use the FN + Brightness Up / Brightness Down keys to adjust the screen backlight. If this method does not work, in this article we will fix the screen brightness does not change.

For example, you did a clean Windows 10 installation and installed the latest drivers. But you’ve had trouble adjusting the screen brightness! You thought the Fn Key didn’t work. Then you have installed Hotkey drivers of the laptop model. But there’s still no solution.

How to Change the Screen Brightness in PC

This problem usually occurs because of the integrated video card on your computer. First, you need to update the driver for the Intel (R) HD Graphics 4000 device.

Follow the steps below to update the driver for your computer’s Intel (R) HD Graphics 4000.

   Step 1

Right-click on the computer and click Manage. After opening the Computer Management window, click Device Manager. From the Device Manager, click Display adapters, then right-click on the Intel (R) HD Graphics 4000 and click Update Driver Software … in the window that opens.

Device Manager

   Step 2

Click Search Automatically for Updated Driver Software. Make sure that the Windows Update service is turned on, or the device driver will not download over the Internet.

Search Automatically for Updated Driver Software

   Step 3

If your driver is already up to date, you will see a message like the one shown below.

Interl(R) HD Graphics 4000

   Step 4

After updating the graphics driver, restart your computer and try to change the Display Brightness. If the screen brightness does not change, restore the driver of the integrated graphics card as follows.

After applying this method, you will be able to change the screen brightness of your PC and Laptop, but the driver will not be up to date.

Restore Driver

   Step 5

In the Undo Driver Package window, select My apps do not work with this driver and return to the previous driver version by clicking the Yes button.

My Apps Don't Work With This Drive

How to Configure Regedit for Screen Brightness

If the screen brightness still does not change after you perform the above steps, you must configure the Regedit settings on the operating system you are using.

To change the screen brightness, configure your Regedit settings by following the steps below.

   Step 1

Open the Run window by pressing the Windows Key + R together. After you open Run, type Regedit in the Open: field and click the OK button.

Starting Regedit

   Step 2

After the Registry Editor opens, click HKEY_LOCAL_MACHINE in the Registry.


   Step 3



   Step 4

Under SYSTEM, click ControlSet001.


   Step 5

Under ControlSet001, click Control.

ControlSet001 / Control

   Step 6

Under Control, click Class.

Control / Class

   Step 7

Under Class, click {4d36e968-e325-11ce-bfc1-08002be10318}. Please note that you have selected the right option here!


   Step 8

Under {4d36e968-e325-11ce-bfc1-08002be10318}, click 0001.

{4d36e968-e325-11ce-bfc1-08002be10318} / 0001

   Step 9

Find the FeatureTestControl option in the settings on the right and double-click on it.


   Step 10

In the DWORD value edit window that opens, select Decimal.

Changing the DWORD Value

   Step 11

After selecting the decimal option, change the value 61440 in the Value data section to 61512.

DWORD 61512

   Step 12

After entering the value of 61512, click OK.

Save the Settings

   Step 13

Restart your computer after making sure that the FeatureTestControl option has the Data value as in the image below.

Check the Value

Download REG File

You can download the REG file and then use it again when you encounter the same problem.

REG File Download


If you change the value of {4d36e968-e325-11ce-bfc1-08002be10318} / 0001 in the Regedit settings, but the screen brightness still persists, you can try changing the FeatureTestControl value in 0000 in the same way.

   Final Word

In this article, we’ve fixed the screen brightness problem that Win10 users often encounter. After you follow the methods described above, you will be able to change the screen brightness of your computer. Thanks for following us!

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One Comment

  1. Avatar for Chad Chad 12 July 2020

    This worked perfectly and allowed me to actually change the brightness. I was unable to do so before! Thank you!


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