After Device Manager scans the changes, it automatically reinstalls the basic Microsoft Driver on your screen to reactivate the Brightness Slider sliders. Step 8: Confirm Monitor is displayed again on the list. Click this button to scan for new hardware installed on your system (or in your case, the driver does not have Driver installed). This is a small square button with an image of a magnifying glass in front of the computer icon. Step 7: Click the Scan for hardware changes button in the corner of the same Device Manager. You should now see the Monitor item disappear. After the driver has been removed, the Device Manager list will be refreshed. Step 6: Wait a few minutes to uninstall the Driver. Now a new window will appear, in this window, check the box Delete the driver software for this device and then click OK to confirm. Step 3: Right-click Monitor select Properties. On the screen you can see a list of different items including Disk drives, Display adapters, Keyboards (keyboards). Missing Brightness Slider slider may be due to software error or Driver error, you can control on Monitor. In Device Manager you can control and adjust all hardware installations on your laptop. devmgmt.msc on the Search frame, then press Enter to open Device Manager. Step 1: Click to select Start Menu then enter. Restore lost Brightness Slider (on the laptop)
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