Hi,Fairwood1111. Welcome. It's possible that the install somehow became corrupted. You may want to try the Norton Remove and Reinstall Tool, which is designed to give you a clean install.
If you use it, please read the Before you begin note at the top of the download page and run Live Update after, until no more are found.
A reboot after never hurts. Here is the link. http://www.norton.com/nrnr