Install this now!By
Microsoft released KB948496 which is an update that disables ALL of the Scalable Networking components that were added into Windows Server 2003 SP2 last year. The previous update only disabled two of the four components, and in practice, systems have continued to have problems when any of the Scalable Networking components were enabled.
This update could come down with Automatic Updates this month, but may not get automatically installed. If you are running SBS 2003 with Windows Server 2003 SP2, you need to install this update.