I tried this but still the brightness of my Macbook 17" i7 is grey. I am not getting full sharp bright screen which I was getting in Windows 7 before.

I am using MacBook Pro 17" i7. I just installed Windows 8 on it. I installed latest version of Bootcamp. Somehow the brightness of screen is not fully bright. F1 and F2 does work but does not give me shiny bright. I tried Windows Setting->Brightness but the level is on top and still have grey brightness.

Do you think Apple Store can help me If I take my MacBook to them?