Vista SP1 - Old Conexant HD Audio drivers

Windows Update didn't offer me the option of installing Vista SP1 on my Lenovo 3000 v200 (0764-33G) whereas it appeared on other machines. I checked all the driver versions as per the following page:
http://support.microsoft.com/?kbid=948343#method5
It seems that the only old driver out of those listed on the page and installed on this machine is the following:
Conexant HD Audio version 4.19.1.0
I have checked for a newer driver on both Lenovo's support page and through Lenovo System Update but haven't found any. Does anyone know if there's an updated version of this driver anywhere, and if not, when is a newer version expected to be released through Lenovo System Update?
Thank you.

I have the same problem with drivers for Authentec fingerprint reader on my N200 0769-BRG. Are there any updates planned to support Vista SP1 ?

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