*applies standard Jeffers fix*
Run internet explorer (MUST run MSIE not firefox or opera or any other)
open the "File" menu
check that "Work offline" is not ticked.
also please post the FULL msinfo and DXdiag.
People often post the same info you did, It's not very helpful as it doesn't tell us the specific details of your system config (not system specs) that cause these sort of problems.
Ahh good old Norton... It gets worse with each release.
Why it can't just pop-up and tell you that the program file has changed and ask if you want to allow the new version.
Just like good ol' ZoneAlarm. Ahh the greatness, I could drown in its splendor. Ahhhh
Laters