Help! Remote Desktop Connection just shuts down after connecting to a machine.

Another day, another problem. (Always problems, including one involving W32.Blaster, but not the point.)  I had to log onto a remote machine using Remote Desktop Connection to do some McAfee work (ah, McAfee Endpoint Encryption.  Never a dull moment with you.) Today, though, it was the server housing the McAfee database that decided to give …