From that Dell Forums thread you posted I see that 27Dean posted
I did the online chat with McAfee. He had change a few settings in McAfee. About three weeks now and still working.
An earlier poster stated that a System Restore temporarily worked, it will mess your McAfee up doing that and an update will be required to sort it out which will no doubt restore the problem. Other posters recommend disabling the firewall, an extremely dangerous move & not recommended. I would approach Technical Support as 27dean did.
I'm saying in Windows Network Center there is no mention of any tuner device or Windows Media Center. So I can't check the IP for same. I would imagine it is my home IP (same as everyone) 127.0.0.1. I guess for internal tuners it's different.
We have two threads going here, getting confusing.:)