Ok, something interesting just happened. I have never had any anit-virus software installed and never had a problem (except for that blaster thing a couple months ago.) At the suggestion of all of you, I downloaded and installed the Norton 2004 package last night.
A few minutes ago, Norton just popped up a High Risk Alert which said the following: "Attempt to connect to local computer using Backdoor/SubSeven Trojan horse detected."
What's the story with this?
