Acer Aspire 572-6805 :: Unable To Change Screen Brightness

Dec 1, 2014

Screen automatically dims as I go in little dark areas and gets too bright when it has so much light around it. I am trying Fn+ arrow keys but they make very less difference. Is there any way to control this?
 
I am using Windows 8.1 and display drivers are Intel HD Graphics Family version 10.18.10.3316.

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