http://service1.symantec.com/SUPPORT/nav.nsf/docid/2003070306192806To run LiveUpdate and download the latest program updates
Start Norton AntiVirus (NAV). If NAV is installed as part of Norton Internet Security (NIS) or Norton SystemWorks (NSW), then start NIS or NSW.
Click LiveUpdate.
Download all available updates, and restart the computer when prompted.
Start NAV (or NIS or NSW), and then run LiveUpdate again. Download all available updates, and then restart the computer again if prompted.
Repeat steps one though four until you see the message "Thank you for using LiveUpdate. All of the Symantec products and components installed on your computer are currently up-to-date. Remember to check for new updates frequently."
If you continue to receive this error message
If you continue to receive this error message, check your version of NAV 2003. Then follow the instructions in the collapsible section that applies to your version of NAV 2003.
To check your version of NAV 2003
Start NAV. (If NAV is part of Norton Internet Security (NIS) or Norton SystemWorks (NSW), then start NIS or NSW.)
Click Help and About Norton AntiVirus. (If NAV is part of NIS, click About Norton Internet Security and then click the Norton AntiVirus tab. If NAV is part of NSW, then click About Norton SystemWorks and then click the Norton AntiVirus tab.)
Note the version number. If you have version 9.9.06 B or 9.9.06 D then go to "If you have NAV 9.9.06B or 9.9.06D." If you have any other version, then go to "If you have any other version of NAV 2003."
If you have NAV 9.9.06B or 9.9.06D
This version of NAV cannot currently be updated to the latest version of the Common Client program. Symantec is investigating this problem. There is currently no solution. This document will be updated when new information becomes available or a solution is found.
In the mean time, do not install the Common Client update. NAV will continue to fully protect your computer without the update. The update does not effect the functionality of the NAV email, IM, or manual scanner or the Auto-Protect feature of the program.