Windows NT User or Group servername\Administrator not found

[ebferro]

I'm a Sharepoint 2007 newbie. I've just installed it and I'm getting an error in my server application event log that says 'Windows NT User or Group servername\Administrator not found'. The Event ID is 7888. I've searched the net but can't seem to locate any information on the error. The text of the error is as follows. This error is generated once every minute in the error log. I'm not sure what has caused it and what to do to fix it. There is a servername\Administrator account on the server. Thanks in advance for any help that can be provided.


Event Type: Error
Event Source: Office SharePoint Server
Event Category: Office Server General
Event ID: 7888
Date: 9/1/2007
Time: 8:54:12 AM
User: N/A
Computer: MNTSERVER
Description:
A runtime exception was detected. Details follow.
Message: Windows NT user or group 'MNTSERVER\Administrator' not found. Check the name again.

Techinal Details:
System.Data.SqlClient.SqlException: Windows NT user or group 'MNTSERVER\Administrator' not found. Check the name again.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at Microsoft.Office.Server.Data.SqlSession.ExecuteNonQuery(SqlCommand command)
at Microsoft.Office.Server.Data.SqlServerManager.GrantLogin(String user)
at Microsoft.Office.Server.Administration.SharedResourceProvider.SynchronizeConfigurationDatabaseAccess(SharedComponentSecurity security)
at Microsoft.Office.Server.Administration.SharedResourceProvider.SynchronizeAccessControl(SharedComponentSecurity sharedApplicationSecurity)
at Microsoft.Office.Server.Administration.SharedResourceProvider.Microsoft.Office.Server.Administration.ISharedComponent.Install()
at Microsoft.Office.Server.Administration.SharedResourceProvider.Provision()

For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.