Hey dspeidel,
If zigar's advice doesn't work, you might want to do this. Uninstall your Norton stuff. Then do a search and make sure you find all the Norton files still on your computer. Search for anything with the words "Symantec" in it. Delete all of it. What can happen is that when you uninstall, not all of the old files are removed. For some reason a new installation won't work properly if you don't get rid of the old ones. You may not be able to delete it all, but delete everything you can. After you manually get rid of all the old files, then try reinstallation.