Everytime you reboot you find the above error within your event log. Event ID is 140

Error is similar to the one below:

Event Type:      Error
Event Source:      Report Server Windows Service (MSSQLSERVER)
Event Category:      Startup/Shutdown
Event ID:      140
Date:            5/18/2010
Time:            4:17:04 AM
User:            N/A
Computer:      MAPCOM
Description:
The application domain WindowsService_0 failed to initialize. Error: Microsoft.ReportingServices.Diagnostics.Utilities.ServerConfigurationErrorException: The report server has encountered a configuration error.
   at Microsoft.ReportingServices.Diagnostics.RSConfiguration.get_ConnectionString()
   at Microsoft.ReportingServices.Library.ConnectionConfig..ctor()
   at Microsoft.ReportingServices.Library.ConnectionManager..ctor()
   at Microsoft.ReportingServices.Library.ServiceController.ServiceStartThread(Object firstStart).
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This usually occurs when the reporting service is trying to connect to the SQL Server but the SQL Server has not completed started.

To get around this you can delay the reporting service from starting – see http://support.microsoft.com/kb/193888