What driver to install for external display on sony vaio

[premstephen]

Pls help me on what driver to install for external display on sony vaio, I recently installed win 7 ultimate on my VGN-CR14GN/B series all is goint fine except F5,F6 & F7 keys + when i connect to an external device the multiple display tab is missing and hence cannot connect to my external monitor, pls help

 

[christop]

Go to Sony and download the drivers and software for you laptop. I had the same issue with my care after reinstalling win7 on it. None of my function keys worked until I got all the drivers.