Thanks for the response. I don't use FRAPS or similar recording info. However, I recently had a hack attempt into the computer - so I wonder if that added registry items such as the FRAPS (or similar) that you mentioned.
Also, you gave me a good idea, I can (from my normal master) add the normal slave computer - though it doesn't recognize it. However, if I attempt to make my normal slave the master and find the slave (my normal master) it returns "Hostname "aaaa" doesn't exist." And yes, I matched up the host name to the other computer (and port) to make sure it's correct.