Hi lawgrl73, welcome to D-A-L.com
I'm not running Norton Anti-Virus but I am running Symantec Internet Security which is Norton Anti-Virus plus some extra stuff. I've had a look on my PC and have a suggestion - it might help, it might not:
Go into Windows Explorer and navigate through the tree
Expand your C: drive
Expand your Program Files folder
Expand your Common Files folder
Expand your Symantec Shared folder
Do you have SymSetup folder in there and does it contain a single EXE (application) file? If so, double-click it - you should find that's the Setup program.
Let us know if that helps. If it doesn't, we'll come up with another answer