I am not familiar with your specific issue as I never encountered in my IT career, but I would like to suggest you uninstall Norton, and use a free antivirus. Avast is my personal favorite, but there are other good ones out as well. I only recommended avast as its the one I have used the most on friends and family PC's and I am familiar with it.
I do not use antivirus on my own personal pc, but its not needed as I use Linux.