Nasel jsem tenhle popis. Sice si myslim ze by se to melo delat jinak, ale jsem linej dal hledat :D .
Right-click Computer and choose Manage
In the window that opens choose Services and Applications/Services
In the new window double-click on the Service name 'Adaptive Brightness' and disable it and Stop the service
OK your way out and see if that makes a difference.