To be honest, im not saying Norton is bad, but its way over-priced.
I have a better alternative....Software Restriction policies....
Follow this guide:
That will make your system where you have to "right click" a file and run it as administrator before it will even install....Drive-by malware is dead in its tracks.....You would purposely have to right click and file and run it as admin to get infected in 99% of circumstances.
Next change your User Account Control settings to the highest level (always prompt)
Then you can run the built in Defender, or another free/or cheaper AV since your not relying on it to protect to.
I got a 3 year license to GFI Vipre Internet Security cheaper then a 1 year sub to Norton or McAfee....I like Vipre because it is light, I don't know its there and it seems to work if needed. However I rely more on SRP then AV to protect me.
you can save some money by using SRP....or you can buy the Standard version of Faronics anti-executable....both offer more protection then AV software....using either SRP or Faronics Anti-Executable means AV is just a secondary help...its not your primary protection thus you don't have to invest as many funds in I, yet you will get 200% more protection from SRP
again you would have to manually run an executable as an admin to get infected, and I doubt your going to do that...and you can run downloaded files though virus total to check them before install if need be...
im a big fan of SRP and they are not hard to set up and they work famously..