I have multiple PC's in my house and they WERE all running Norton Security Suite when my firewall appliance on my home network blocked 5 viruses from being downloaded via Norton's Live Update servers. While Norton Antivirus was trying to update itself on three of my computers that were turned on and in use throughout the day, Norton tried pushing rootkits onto these three, but it was caught by my Untangle firewall antivirus app before it made it to the network.
I'll attach a screen shot of me logged into the web utility for Untangle. I'm very concerned about this. It appears that, like I said, a rootkit was being downloaded over their update servers. Someone explain this. I've already stopped using the product, but would like to know. Pay attention to the inside of the red box.
The virus blocked was as follows: Gen:Rootkit.Heur.cu4@bi9U02g