It serves more as a translator between hardware and a software. A device driver basically acts like a middleman between the software/operating system and the hardware and enables seamless data exchange with one another. Here are the workarounds to fix the Brightness slider not working in Windows 10 – Update Display Adapter DriverĬorrupted, incompatible and outdated drivers usually result in brightness control problems in Windows 10. So, you need to update the display driver to check if it solves the problem. So, you need to update display driver, try Microsoft’s Basic Display Adapter, or restore to default settings. You need not execute any complex changes to make the slider work again. The problem can be due to incompatible, incorrect or outdated drivers.

Brightness Slider not working in Windows 10 Solutions