Users using thin clients are getting this message and then their thin client terminal reboots.
This is the message in the event log of the server - server - Windows 2003 server - std edition -SP1
Event Type: Information
Event Source: Application Popup
Event Category: None
Event ID: 26
Time: 11:24:30 AM
Application popup: System Shutdown : The system is shutting down. Please save all work in progress and log off. Any unsaved changes will be lost. This shutdown was initiated by NT AUTHORITY\SYSTEM. Shutdown will begin in 42 seconds. Shutdown message: Windows must now restart because the Remote Procedure Call (RPC) service terminated unexpectedly.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp