The latest version of Norton 2002 AntiVirus should be 8.07.17c. Make sure you have run LiveUpdate. They recommend you run it until you get all the updates. You need to run LiveUpdate once a week for the new virus definitions or put it on auto update. After you update the program and you still have the same problem see Symantec's web site and search their knowledge base with the exact error message.
http://www.symantec.com/techsupp/
Norton stops the W32.Klez.gen@mm virus.
Date: 5/4/02, Time: 17:08:28,
The email attachment SIZE.exe is infected with the W32.Klez.gen@mm virus.
The file was quarantined.