Hi there,
If rolling back on the driver does not work, try system restore in safe
mode choose no when yes or no is asked and system restore will open and roll
back to a point before the errror occured.
If your sound is working fine than just leave it be working fine

Never use
WU update for hardware drivers and always check what you are installing from
WU.
Best regards,
Michel Denie
"bluecrystal99" <> wrote in message
news

16059C4-94E0-4987-81E3-...
>I installed an optional Microsoft Update for
>
> "Conexant-Sound-Conexant High Definition Audio"
>
> I now have lost my audio device and have no sound. I followed some trouble
> shooting steps and that didn't help. The updated failed to install and the
> error detail is:
>
> Code 800700FF
>
> Any help would be great!