Expand the menu by right-clicking and then press in graphics devices and uninstall it from the drop-down menu. You have to open Device Manager once again. The one another easy way to fix your Windows screen brightness control problem would be reinstalling the display adapter driver and for this – However, if you don’t want to use manual or automatic methods, then you can also download driver installer apps and they will automatically download the latest system drivers for you. But, if you go for a manual option, then you have to search for the compatible display adapter driver and download it online or from your USB drive. If you select the automatic option, then your computer will search for the compatible drivers and you can download them. Next, you will be given two options – download the driver automatically or manually. In Device, Manager Window looks for the Display Adapter option and expands it by right-clicking and then select the Update driver option from the submenu. To update the display adapter driver, you need to follow these steps – 
So, if your display adapter driver isn’t updated, then you might not be able to adjust the brightness of your screen. If a compatible driver isn’t present on your computer, then the computer will not be able to send and receive data correctly. It is like a translator that helps in establishing the communication between hardware and software as they both are mainly designed by different manufacturers. The display driver is very important software that ensures how your display settings will interact with the particular hardware like your monitor.
And restart your PC to apply these updates and check if there is no problem with Brightness control.Īs discussed before If your display adapter driver is outdated or incompatible with your computer, then you might face a problem with controlling the system’s brightness. Hit check for updates button to allow Windows updates download and install from Microsoft server,. Click update & security the Windows update,. Press keyboard shortcut Windows + I to open the Settings app,. If the brightness adjustment issue occurs immediately after upgrading to Windows 10 20H2, we recommend to check for and install the latest Windows updates that probably help to fix this problem. Lenovo – Hotkey Features Integration for Windows 10 or AIO Hotkey Utility Driver. HP – HP Software Framework and HP Hotkey Support. Pro Tip: If you found that adjusting the brightness in Windows 10 settings works fine, but the function keys (Fn) of brightness control on the laptop keyboard doesn’t work, most likely you need to install additional software from the laptop manufacturer.
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