Let me see if I understand your situation. You're trying to upgrade your Norton System Works. Did you buy a new Norton System Works CD?
If so, is the CD not installing correctly because it sees an earlier version that needs to be removed before installing the new one?
Windows XP has a feature called "System Restore". It won't restore deleted files, but it might reset your registry so that you can install the new version of Norton System Works. Post again if the situation described above is correct. I'll give you the steps to run the "System Restore" option.
If my assumption is wrong, that you haven't purchased a new version of Norton System Works, but rather you wish to download updates to Norton System Works (including Norton Anti-Virus), you can probably purchase a used version of Norton System Works on an auction site like Ebay or Amazon.com for a reduced price.
Ebay lists System WorksAmazon listing for System WorksNote: the two links above may not work correctly. If not, you can just go to
http://www.ebay.comor
http://amazon.comand type in the search for "Norton System Works" (without quotes).
ivnj posted this link about System Works Perhaps
ivnj will post here with his experience with ordering from this vendor.
I hope something here will help!
Dwight