Error communicating with the Spooler system service. Open the Services snap-in and confirm that the Print Spooler service is running.
Like the error message implies, this error is usually logged when the "Spooler" service is stopped on the remote machine you are logging in to with Terminal Services.
You can ignore this error if you are not trying to print, otherwise you should start the Print Spooler service.
Either type "net start spooler" from the command line or navigate to "Start -> Programs -> Administrative Tools -> Services" and start the "Print Spooler" service.