Nonetheless, if you have a PC with brightness controls or adjustment buttons on the keyboard, you need not worry. Some of these reasons might be because of technical complications, while others because of non-technical issues –like a critical battery level. This is because of several different reasons. Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions.Sometimes, the Windows 10 brightness slider will miss from its original position(notification bar). In Device Manager, select Display adapters, then select the display adapter. In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.
If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. To find the brightness slider in earlier versions of Windows 10, select Settings > System > Display, and then move the Change brightness slider to adjust the brightness. The Brightness slider appears in action center in Windows 10, version 1903. To change the brightness on an external monitor, use the buttons on it. You might not see the Change brightness for the built-in display slider on desktop PCs that have an external monitor. Even if you use it, you can still move the Change brightness for the built-in display slider to fine-tune the brightness level. This automatic setting helps make sure your screen is readable wherever you go. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. To find out if your PC supports this, go to Settings > System > Display. Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. (If the slider isn't there, see the Notes section below.) Select action center on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. Settings = logins and desktop)Įither choice, PC will restart and reinstall win 10 but keep any files/user details so its not completely from scratch. Library folders = Documents, pictures, movies, music (the default folders that come with windows). choose keep files/settings (Files = library folders. Go to settings/update & security/recovery If that doesn't work, I would try a reset 1st rather than clean installĬopy anything off C you want to save, just in case reset doesn't work. Then just login to new user and all you have to do is set up browsers and maybe Steam/Onedrive if you used them before. 
So it can have same access to installed files. if it works, you should log back into normal user, make new one admin, and copy contents of C:/users/old user folder on top of C:/users/new user folder Just a test, much faster to make new user than recreate install again. Try making a new user and see if it happens on it as well
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