No helpful explanation, I'm afraid. Just a quick note of sympathy. Norton products are notoriously difficult to uninstall.
Are you aware that there's a special Norton uninstall tool that you can download free from Symantec?
Android Oreo News: Release Date & New Features
Best Photo Editing Apps for iPad
iMac 21.5-inch (2017) review
Comparatif : quelle est la meilleure batterie externe 2017 ?