NIS 2012 & Port 554

When I start my computer and then goto www.grc.com and run the ShieldsUp Test, it comes back and says failed due to Port 554 being open. This is the only info it has on the port:

 

Name: rtsp
Purpose: Real Time Stream Control Protocol

 

I have tried to use the program SysInternals TCPView program, but I can find a listing for Port 554. I run a port test with ShieldsUp about once a month just to make sure everything is ok. But I have installed NIS 2012 Final (19.1.0.28) recently and then noticed that this port was open. I have been doing the port test for a couple of years and know that in NIS 2010 & 2011 this have never been open before. I always have achieved a Stealth Rating.

 

Can someone please help me figure out what is using this port?

 

I am running Win 7 SP1 + All Updates, all drivers are up to date. I have run a Full System Scan and do not have any other security programs running on this machine. I have a very minimal setup (not a lot of programs installed and no known viruses or malware, I like to run a clean and tight install).

 

Thanks!