Problem scenario
You double click on Norton 360, and it does not launch. What should you do?
Possible solution #1
Update Norton 360 by downloading it and using the download manager to upgrade your installation.
Possible solution #2
Remove Norton 360 with Norton Remove and Uninstall Tool:
https://support.norton.com/sp/en/us/home/current/solutions/v60392881
The uninstallation process can take 20 to 25 minutes.