Norton is good if it’s updated frequently and if you have nothing else, but I wouldn’t pay to renew it’s subscription for database protection updates. I would rather uninstall Norton and get AVG or Kaspersky for the money as a Resident A/V software. A lot of experts will warn you that running two antivirus programs that are both resident could cause problems. Resident programs remain running in the background, and resident antivirus programs check every file that comes into your PC or that you open. Having two programs constantly doing this may result in more trouble or slow down your PC.
Additionally, I recommend that people scan their hard drive with another, non-resident anti-malware program once a week, and also if they suspect a breach. When the scan is done, you close the program and it goes away, without staying in memory. SUPERAntiSpyware and Malwarebytes’ Anti-Malware are my favorite choices.