I have a Master's in CIS, am an MCSE, MCSA, am a Director of Technology, and have worked in the field of computers for over 10 years. I have had numerous issues with Norton being problematic so I speak with much experience, my Texan friend.
Kudos to your son who was able to fix the issue! I just get too busy with work to futz around with LW, I have clients to attend to.
If you ever get tired of paying a fee for Norton, try AVG, it's entirely free for home users and does a better job of protecting your system than Norton without the undue interference.
Incidentally, LW lists Norton as being a rather well-known problem when it comes to connection issues.