RC1 reinstalls drivers after first reboot (Dell Inspiron 9300)

> Hi everyone!
>
> I'm having trouble with RC1 (5600) of Vista. I'm running the OS on a Dell
> Inspiron 9300 (Pentium M 1,73 Ghz, 2 GB RAM, Nvidia Geforce 6800 Go 256
> MB).
> After the installation process everything works fine - the graphics, the
> WLAN. When I connect to my home WLAN the first time, Vista updates
> automatically with new drivers for the Intel 2200B/G-WLAN-Hardware and the
> Sigmatel C-Audio-Chipset. After the update everything's running fine.
>
> But after the first reboot everything's going down - the graphics adapter
> isn't recognized, the WLAN- and Bluetooth-Adapters aren't working (Device
> Manager says drivers couldn't be loaded), audio isn't working anymore.
>
> I have a lot of experience with Beta 2 of Vista and everything was fine
> with
> this version. But RC1 is causing much more trouble.
>
> Any ideas what's going wrong with my installation?
>
> Oh, by the way, Vista is installed besides Windows XP Pro SP2 in an own
> partition with 40 GB of space.
>
> Thanks for any advices!
> Dirk
>