I have been trying to find what has been listening on 127.0.01 port 1234 and tonight I was surprised to track it down to the latest version of zone alarm. I am using paid Zone Alarm Pro with anti-virus. Uninstalling the latest version removes the listening on port 1234.
I am curious why the latest version of ZA would want to listen to port 1234. Operating system is windows 7 64 bit. I don't see a reason for an anti-virus to be listening for a connection.