Hướng dẫn 6 cách sửa lỗi không chỉnh được độ sáng màn hình Windows 10

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After performing an upgrade from Windows 7, or Windows 8 to Windows 10 operating system. There are many users who have encountered the error. Windows 10 screen brightness cannot be adjusted. This has caused quite a lot of inconvenience, moreover it also greatly affects the user’s eyesight. So what is the cause? Windows 10 screen brightness cannot be adjusted error? How to prepare? Please refer to the article below to get the answer.

See also: Instructions to upgrade Windows 7/8/8.1 to Windows 10

The reason why you can’t adjust the screen brightness in Windows 10

Currently, there are quite a few laptop users who encounter the problem of not being able to adjust the screen light in Windows 10. There are many causes for this situation, typically: The newly installed drivers are not compatible with the operating system. or because the screen driver is damaged… You should not worry too much about this problem, because the way to fix it is quite simple. You can easily do it yourself at home.

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See also: Instructions for 11 ways to adjust the brightness of the Windows 10 computer screen

Instructions for 6 ways to fix the error of not adjusting the screen brightness in Windows 10

Update Windows 10 operating system again

Updating Windows 10 operating system is the first thing you need to do. Because if the brightness slider does not work, it is caused by the operating system. Especially when you’ve just updated some key features. At this point, updating the operating system will be able to help you.

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All you need to do now is just type Windows Update in the Menu bar. Finally press Enter to check for Windows 10 operating system updates.

See also: Instructions for 3 ways to update to the latest version of Windows 10

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Update Display Adapter Driver

Sometimes, the computer Display Adapter is one of the causes of the error of not adjusting the screen’s brightness. They prevent the screen brightness slider from working properly. Therefore, you need to disable it and re-enable the Display Adapter on the computer to fix this error.

How to update the Display Adapter Driver as follows:

Step 1: You right click on the . icon Windows in the bottom corner of the screen => then select Device Manager.

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Step 2: Extend Display Adapter => Next, right-click on the Desktop Adapter => Select Next Disable Device.

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Step 3: At this point, a dialog box appears on the screen, click Yes. Your computer screen may be turned off and it will be automatically restarted after a few seconds.

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Step 4: Next, you need to reopen Display Adapter screen again. Also right click on Display adapter => Select Enable Device to enable this feature again.

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In case there are other adapters, you need to repeat this process in section Display ADapters.

Update Driver for Laptop

One of the reasons why you Windows 10 screen brightness cannot be adjusted is an old display driver, although Windows 10 usually installs the appropriate driver for the Display Adapter by itself, you should check to be sure.

How to do it through 2 extremely simple steps below

Step 1: First you need to open Device Manager => Open preferences Display Adapter => Then right click Display adapter => At this time, a dialog box will appear on the screen, you just need to click on it Update Driver.

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Step 2: On the computer screen, the system will ask if you want to search for Driver online or if you want to update the driver from your computer. Please choose to search for Driver online, please.

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After the selection is complete, Windows will automatically search for Driver online. Next, you download and install the Driver on your computer. When the installation is finished, you will receive a message asking to restart the computer. After the device restarts, the error cannot adjust the computer screen brightness, Windows 10 laptop is also gone.

In this case, this error has not been fixed. Please follow the steps below.

Step 1: Right click on Start => choose Device Manager. At this time, a window will open on the screen Device Manager.

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Step 2: In the window Device Manager, you click Display Adapter.

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Step 3: Next, right-click Driver installed on your computer. At this point, a new window will appear on the screen, find and click on the words Update driver software.

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Step 4: Then, the system will ask you to give the option to search for Driver online or update the driver from the computer. Please click on Browse my computer for driver software.

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Step 5: A window will open on the screen. Please select item Let me pick from a list of drivers on my computer.

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Step 6: Continue to highlight and optionally enter the line Show compatible hardware => Choose next Microsoft basic display adapter and press next.

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Now Windows 10 has started to use Microsoft basic Display Adapter instead of Adapter-only Display Driver. However, this itself will limit some functions related to Display Adapter your. You will most likely experience some performance issues, as well as not being able to switch to a higher resolution mode. In case the screen slider still works normally. This also means that the problem lies with other drivers, so you need to update or reinstall them properly.

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Run the power troubleshooting program

When the installation process shows some minor errors, this is also one of the reasons why you cannot adjust the screen brightness of Windows 10. To check, you need to run the power troubleshooting program again according to the instructions. following steps.

Step 1: First you need to click on Start located in the lower left corner of the screen => Then click on Open => Then type Troubleshoot settings.

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Step 2: Drag the mouse down and select Power click on it => choose next Run the Troubleshooter.

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At this point, some problems related to power management settings will appear on the screen at the end.

Change in reducing laptop screen brightness in Power Options

If you have followed the above instructions and still cannot fix the error Windows 10 computer screen brightness cannot be adjusted Your computer is most likely faulty. To fix this error, you need to adjust the settings Power, usually this method works mainly on laptops.

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The steps are as follows:

Step 1: Open Start Menu then enter Control Panel Go to the search bar and select the corresponding search result => Select the view to Category for easier search => Continue clicking Hardware and Sound.

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Then click on Power Options.

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Step 2: In this step you need to click on the link Change plan settings located right next to the Power plan you selected.

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Step 3: Please click on the selection Change advanced power settings (It’s near the bottom of the window).

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Step 4: You can scroll down until appears display. Now expand it by clicking on the gear icon.

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Step 5: In this step, click the icon located next to all the options below to expand them.

  • Display brightness.
  • Dimmed display brightness.
  • Enable adaptive brightness.

Step 6: After clicking on the options, you click the . button Apply => Then click on OK.

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Step 7: Finally try to restart your laptop and check for the error

Remove hidden devices in PnP Monitors

Just like the above method, this fix only applies to the operation of PnP Monitor. If you are already using these options, then follow the steps below to fix the error Windows 10 screen brightness cannot be adjusted Please.

Step 1: First you need to press and hold the key combination Windows + CHEAP (This is the operation to launch the application RUN).

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Step 2: You enter a keyword devmgmt.msc => press OK to activate Device Manager.

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Step 3: From the Menu bar of Device Manager, click on View => choose next Show device. In case you have disabled this feature, continue to turn it back on.

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Step 4: Extend Monitor by clicking on the arrow icons.

Step 5: Then right click on every hidden device and select Uninstall device (Typically, hidden devices will be dimmer than active devices).

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Step 6: Power off and restart the computer. Then try to adjust your Windows 10 screen brightness to see if the problem is fixed.


Here are some ways to fix the error Windows 10 screen brightness cannot be adjusted. Hope the above methods have been helpful for you. Good luck.

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