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Learn how to fix, if you can't change screen brightness in Windows 10/8/7. This problem might occur due to issues with your display adapter.

In Windows 10, if you’re unable to change screen brightness, this article is for you. Screen brightness is important factor on your display for your system and you should be able to adjust it as per your convenience. But sometimes due to issues with drivers/display adapter or graphics card, you might not able to change screen brightness.

We recently faced this problem on one of our Windows 10 machine. When we tried to change screen brightness from Settings app > System > Display, the slider will not work. No matter where we move it, there is no change on actual brightness of the screen:

FIX Cant Change Screen Brightness In Windows 10

If you’re also experiencing this issue on your system, here’s how you can fix it.

FIX: Can’t Change Screen Brightness In Windows 10/8/7

FIX 1 – General Suggestions

1. First of all, reboot the machine and see if you can change brightness level then.

2. Update your display driver to latest version.

3. Microsoft may also release some updates for display drivers, so make sure you install latest Windows Updates available to you.

4. If points 2 & 3 doesn’t helps, open Device Manager (run devmgmt.msc command), try uninstalling your display adapter and then click Action > Scan for hardware changes.

5. Reset your power plan to default and see if that helps you in this case.

6. Try changing your screen brightness via graphics card settings panel (right click on Desktop and select your graphics card option).

FIX Cant Change Screen Brightness In Windows 10

FIX 2 – Via Power Troubleshooter

If FIX 1 can’t solve this issue for you, then try to run Power troubleshooter from Settings app > Update & security > Troubleshoot.

In some cases, Power troubleshooter has resolved this issue magically. After running the troubleshooter, brightness slider started working as expected in our case as well.

FIX Cant Change Screen Brightness In Windows 10

FYI: Power troubleshooter is only available in Windows 10.

Refer FIX 3 mentioned below, if issue still persists.

FIX 3 – Install Basic Display Adapter

1. Press W8K + R and type devmgmt.msc in the Run, hit Enter key to open Device Manager snap-in.

Device Manager Windows 10

2. In the Device Manager window, click Action > Add legacy hardware.

FIX Cant Change Screen Brightness In Windows 10

3. Next, in Add Hardware wizard screen, click Next.

FIX Cant Change Screen Brightness In Windows 10

4. Moving on, select Install the hardware that I manually select from a list (Advanced) option. Click Next.

FIX Cant Change Screen Brightness In Windows 10

5. Then in next screen, click Display adapters and then click Next.

FIX Cant Change Screen Brightness In Windows 10

6. From the list of devices, under Standard display types or Microsoft, select Microsoft Basic Display Adapter, click Next and thus install this basic display adapter.

FIX Cant Change Screen Brightness In Windows 10

Close Device Manager and reboot the machine. After restarting your system, you should be able to change screen brightness.

Hope something helps!


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