Why can’t I change my screen brightness with Windows 10?

I recently got the Windows 10 upgrade on my laptop, and now I can’t adjust the brightness of my screen. I don’t know what the name of the model I have is, but it’s an Asus laptop with a touchscreen, model number atheros/ar5b125. Before the upgrade, I adjusted my screen brightness by holding the Fn key and pressing f5 or f6 to lower or raise it. Now when I do that, nothing happens.

No brightness bar or anything. I went into the display settings and tried adjusting the brightness bar there, but when I adjust it, nothing happens. It doesn’t even let me apply the changes when I adjust it. The button stays grayed out.

It’s really causing problems, because I use my laptop a lot, and the level the brightness is at now is hurting my eyes and draining my battery way fast. Is there a setting I have to change, or an auto-adjustment thing I have to turn off? I can’t find any answers.

I suggest you to try updating the Display Adapter drivers and check if it works for you.

Follow the steps to update the Display driver:

  1. Press Windows Key + X key and click Device Manager.
  2. Expand ‘Display Adapters’.
  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 its updated and verify. 

Also try to access the computer manufacturer website and download and install the latest display and chipset drivers.

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