I would recommend uninstalling Norton, with the removal tool, click here, and use AVG or any of the other freebies.
I've been using all the freeware for nearly 2 years, and would never go back to the "paid for programs".
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?