Hi,

Actually I went to the Dell Boards and found that although they didn't have
the updated driver in the Dell 6400, they had it in another computer type.
Therefore I upgraded the drivers to the new version and it worked fine.

Cheers,
Lara

"Justbob30" wrote:
[color=blue]
> 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=green]
> > 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][/color]