Your HJT log is clean.
The first thing that comes to mind is disableing Norton firewall and use a free firewall like Sygate.
Sygate Firewall
From what I have been able to gather uninstalling Norton 2005 can be a bugger but can be done by going to Symantec website and following instructions there.
In my opinion AVG is much better due to not being a hugh resource hog like Norton.