SOLVED: The problem with Norton Security Suite was not the software, but the linksys/cisco router. Linksys WRT110 V1.07 has a issue where it blocks or mis-handles some of the live update protocols. All you need to do is downgrade to V1.05 and it works as intended.
Found here and in other Norton forums:
Note, the forum above also has a link to the V1.05 of the software for a downgrade, if you need it
Environment: Linksys WRT110 V1.0; original V1.05 firmware upgraded to V1.07; Norton Security Suite 4.3
Symptom: Manual live update stalls; and your definitions are not updated
Solution: Downgrade the router to V1.05 and it works as intended.
Setting up your computer as a DMZ, directly internet facing. No, strongly suggest against it. Worse, the Norton folks said "go ahead" the Norton Security Suite will protect you. Sure, make my IP internet facing, and ignore any privacy/security concerns that the Norton Security Suite (which wasn't updating) would protect me. In general, in my opinion, there are "few" reasons to set yourself up as a DMZ. A few would be some serious gaming; video conferencing; or perhaps a wireless camera that you access remotely/directly. I would strongly discourage anyone accepting DMZ as a work-around for something broken.
Comment: Thank you for suggesting different anti-virus; but that wasn't my question. I used to use Norton Corporate Security plus Sypbot and another firewall product. For me, Norton Security Suite appears to work...although I do find it difficult to configure as a user. Thanks for the thoughts.
And for those that described that there is a "difference" between the comcast version and the norton retail version, please substantiate your response with a link to those differences. That would allow for an informed decision.
dw (Dec 3, 2010)
Edited by dr.wireMORE, 03 December 2010 - 03:49 PM.