Hope I didn't rub you the wrong way johngerity, just trying to help :-).
I think you're right about the issue being linked to Norton GoBack. Often if a file is in use then chkdsk will report "Deleting index entry." I've seen this when I tried to do a chkdsk and a defrag or Windows update simultaneously.
To confirm that it's an issue with Norton, or some other software, use msconfig to stop all startup items and all non Microsoft services then rescan.
-good luck-