Brightness control key (F2 and F3) not working

I have hp 2000 2202tu laptop which i upgraded to Windows 10 on 4th sugust 2015. The only problem remain is the brightness control key F2 and F3 is not working. Rest every function key is working fine. Can anybody help me in this regard. Please hel me as i regularly need the brightness control...on my pc.... Thank you in advance.

This issue is most likely related to the Graphic drivers. I am having similar issues on my DV6-3143us with the graphics driver. Also it could be the keyboard hotkeys need to be installed/configured, but I havent had that issue on my machine.

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