Frankly, an outdated Norton is much like having NO antivirus.
My advice? Get AVG, uninstall Norton and install AVG.
There is nothing "good" that the "combo" will give you.
Bob
A friend has outdated Norton running.Can I run AVG with it or should we remove Norton and run AVG only?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic