Vaio laptop. Cant adjust brightness

[VaioEseries]

My laptop Vaio E Series sve1511rfxb. Since I installed new windows 7 ..i cant adjust brightness in it. function key for brightness not working and no adaptive brightness option.
Please Help

 

[popatim]

download and install the hotkeys utility please.

 

[Phillip Corcoran]

You can also adjust screen brightness with Windows:
Control Panel >> Power Options
Screen brightness slider is at the foot of Power Options window.