I have been getting this error in my Windows 2003 SBS server event log every hour for several months, even after I installed all the latest MS updates.
The description for Event ID ( 0 ) in Source ( .NET Runtime ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: .NET Runtime version 1.1.4322.2407- AutoApprove.exe - Common Language Runtime Debugging Services: Application has generated an exception that could not be handled.