10 years ago Norton used to be half-decent software. Since then Symantec have bought it and transformed it into the biggest suite of bloatware garbage known to mankind.
The best thing you can ever do for your computer? Get rid of Norton. It's slow, it's crap, and it makes you unneccessarily paranoid.
A decent antivirus (eg. AVG), the built-in Windows firewall, and a small dose of common sense is more than enough for most people.