- Moved by ZigZag3143xMVP, Moderator 8 hours 45 minutes ago Wrong Section for OS
Hey refer this link to control your brightness settings on Windows 8.1 PC
windows.microsoft.com/en-us/windows/adjust-monitor-brightness-contrast
Here You can check Brightness control settings.
https://www.wiknix.com/brightness-not-working-in-windows-8-1/
Hi
This problem is normally related to display drivers, if Update driver didnt help, try reverting the drivers back to the officially supported manufacturers version or previous version see if it work. I suggest you download the version from manufacturer website for one more try. In the other hand, if you are using a driver from manufacturer, try uninstall this driver and install with Microsoft version for good measure.
Regards,
D. Wu