chipset not supported

Hi, I've installed windows 7 build 7100 and a couple of functions on my laptop are no longer working, specifcally the fn keys for my sony vaio VGN-FE21H. I went onto the sony euro site and got the original drivers for my laptop and tried to install these, on installing the chipset drivers I received the error OS not supported. I'm a pretty basic user so not sure on how to proceed - does anyone have any ideas on where I can drivers for my vaio model that well get the fn keys working? any help appreciated. thanks peter

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