Problem: No sound with windows 7 upgrade

Dear HP Community,
I own a "HP TouchSmart IQ771.uk " and I have upgraded it from Windows Vista to Windows 7.
but now I have no sound. I believe its because It doesnt have the driver that supports Windows 7, but Im not sure.
I would appreciate some help or suggestions.
Thank you 

Try downloading and installing the Vista driver from
Microsoft Update Catalog (Make sure you download the correct version (32-bit, x86; 64-bit, amd64)
http://catalog.update.microsoft.com/v7/site/Search.aspx?q=HDAUDIO%5CFUNC_01%26VEN_11D4%26DEV_198B%26...
You will need to extract the cab file and use Device Manager to install the driver.

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