As Da_Taxman says.
Also, consider it an opportune time to get rid of Norton.
While it has good detection rates, it is a burden in some ways. New users get saddled with it because it “comes free” with their new computer.
A generous review here: (easy to find harsh ones)
If you want a “paid for” AV, consider something like NOD32.
It’s a robust, industrial-grade AV with a light resource hit.
If I were to gift an AV to a friend, it would be NOD32.
I have a free suite on this machine that includes Avast! (AV), Spyware Terminator (AS) and Comodo (FW) .
Works well, keeps me safe.
One more thing to keep in mind…
If you want to dump Norton, you may have to go to their site and grab a removal utility (software that will totally clean out Norton)
Why? Because Norton embeds deeply and can be difficult to remove completely.