I wasn't referring to the updates! I was referring to errors !
NAV 2003:
If you run System Restore and the Virus Definitions entry in the NAV System Status screen displays "Error", then follow the steps in the document "Error" is displayed in the Virus Definitions entry of the Norton AntiVirus 2003 System Status screen.
NAV 2002:
If you run System Restore and see the error message "Unable to initialize virus scanning engine database files" or "Unable to initialize virus database scanning files" after restart, then it indicates that the virus definitions folder and the scanning engine no longer match. To fix the problem, follow the instructions in the document Error: "Unable to initialize virus scanning engine" or "Unable to initialize virus database scanning files" after installing Norton AntiVirus or running Windows System Restore.
If you run System Restore and the Virus Definitions entry in the NAV System Status screen displays "Error", then follow the steps in the document "Error" is displayed in the Virus Definitions entry of the Norton AntiVirus 2002 System Status screen.
NAV 2001:
If you run System Restore and see the error message "Unable to initialize virus scanning engine database files" or "Unable to initialize virus database scanning files" after restart, this indicates that the virus definitions folder and the scanning engine no longer match. To fix the problem, follow the instructions in the document Error: "Unable to initialize virus scanning engine" or "Unable to initialize virus database scanning files" after installing Norton AntiVirus or running Windows System Restore.
For more information on how NAV works with Windows System Restore, see the document Windows System Restore and how Norton AntiVirus interacts with it.