It's a simple fix really, uninstall the sigma tel driver via add/remove
programs, reboot, let the computer find the Microsoft driver, check windows
update, install sp1, wait a day or two using us m/s drivers, when you are
happy sp1 is working well, download and install the same sigma tel driver
you removed, it will install and work fine......as I understand it, the only
problem with the dell sigma tel driver is that the update process can not
control it's removal and reinstall by itself so, it needs your help.

"lforbes" <lforbes@discussions.microsoft.com> wrote in message
news:7F480986-3DA5-42F7-BFFB-7E1127AA843E@microsoft.com...[color=blue]
> I have a 1 year old Dell laptop and wanted to install Vista SP1.
>
> Unfortunately Dell has not provided the updated drivers for the SigmaTel
> Audio drivers and my version has issues with SP1.
>
> Luckily I read this before installing it. Hopefully Dell will get on board
> but I have no way of contacting them as I am out of warranty.
>
> Check your drivers on this website before installing.
>
> [url]http://support.microsoft.com/?kbid=948343[/url]
>
> Here are the Trouble Audio Drivers but there are Video and others as well.
>
> Audio drivers
>
> Realtek AC'97 • For x86-based computers: Alcxwdm.sys - version 6.0.1.6242
> or
> earlier
> • For x64-based computers: Alcwdm64.sys - version 6.0.1.6242 or earlier
> SigmaTel • For x86-based computers: Sthda.sys - version 5.10.5762.0 or
> earlier
> • For x64-based computers: Sthda64.sys - version 5.10.5762.0 or earlier
> SigmaTel • For x86-based computers: Stwrt.sys - version 6.10.5511.0 or
> earlier
> • For x64-based computers: Stwrt64.sys - version 6.10.5511.0 or earlier
> Creative Audigy • For x86-based and x64-based computers: Ctaud2k.sys -
> version 6.0.1.1242 or earlier
> • For x86-based computers: P17.sys – all versions (This was originally a
> Windows XP-based driver.)
> Conexant HD Audio • For x86-based computers: Chdart.sys - version 4.32.0.0
> or earlier
> • For x64-based computers: Chdart64.sys - version 4.32.0.0 or earlier
>
>
>[/color]