If you find Window 10 Brightness slider is missing, then it is due to problematic drivers or Team Viewer app. To resolve this problem, you should update your drivers with tool and check the settings of your graphic card software. For detailed info, go to www.office.com/setup.
Method To Fix Window 10 Brightness Control Keys:
1. Uninstall Monitor Driver and Install Default One:
Uninstall Monitor Driver:
For this, you should hit on Windows Key + X altogether to open Win + X menu. Now, you need to select Device Manager from the list of option. Then, you should visit to the Monitors section and just expand it. Here, you need to find the monitor driver and then right-tap on it. Next, you should select Uninstall device. At this point, you should check Delete the driver software for this device and then hit on OK button. After this, your monitor driver is uninstalled and you should hit on Scan for hardware changes icon. It will install the default monitor driver and now your brightness settings will work.
Check Monitor Driver is Disabled:
To check your monitor driver, you should open Device Manager. After this, you should visit to Monitors section and just expand it. In case, your monitor is disabled, then right-tap on it and then select Enable option from the menu.
2. Check your Graphics Card Software:
Sometimes, brightness option isn’t available in your PC and this is a problem but the user can change the brightness option from their graphics card driver software. There are apps like Catalyst Control Center and Nvidia Control Panel which allow the user to change the options related to your graphics card. With these options, you can adjust the screen brightness. Remember, all graphics cards come with driver software, so you can adjust the screen brightness from there.
3. Update your Display Adapter Driver:
To update, you should open the Device Manager. After this, you should tap on Display adapters. Now, you should right-tap on your graphics card and then choose Properties option. Here, you should visit to the website of the manufacturer of your driver’s company and then download the right driver. At this point, you should visit back to Display adapters and then choose Update driver. Next, you should tap on Browse my computer for driver software. Lastly, you need to install the driver and then restart your Computer system.
4. Use Third-party Applications:
In case, there is no brightness option available, then you should change your brightness just by using a third-party application. With third-party application, you can adjust hue, saturation and brightness.
5. Change your Power Settings:
To change your Power Setting, you should tap on Windows Key + S altogether and then enter power settings. Now, you need to select Power & sleep settings from the list of option. Here, you should tap on Additional power settings in the right side of the screen. Next, Power Options window will display on your screen. At this point, find your currently selected play and then hit on Change plan settings. After this, you should hit on Change advanced power settings. At last, you should enable these options: Display brightness, Dimmed display brightness, and Enable adaptive brightness.
With these methods, you can fix Window 10 Brightness Control Keys. For more info, just hit on office.com/myaccount.