Honestly? I'd uninstall Norton. It false positives way too many things, and has shitty quarantine. It's not like it's the only one that does that, either- Avira, McAfee, Avast, AVG- the list goes on. Basically all the big names false flag hundreds. Run noscript set to blacklist everything but what you specifically whitelist to prevent scripts running that can be compromised, get a few trusted lists and verify them, then get UBlock Origins and do the same, and then once more with Ghostery. This basically covers all your bases that Norton and other AVs protect from, and if you utilize a program like Spybot Search & Destroy, Malwarebytes' Anti-Malware (either the $20-paid-for-forever passive version or the freeware active-scan-only version) and Anti-Rootkit and similar tools to scan and hard eradicate files from places that you don't trust, if you really want to go to the extreme of thoughtful safety, also opening them in a sandbox environment first, like Sandboxie, to protect the rest of your computer. No AV program can really compare to filtering what you allow in the first place and then intelligently allowing them into your computer space.