It is reported that the Symantec Endpoint Protection (SEP) clients are not updating the definitions correctly.Review of the Symantec Endpoint Protection Manager ‘s (SEPM) Log.LiveUpdate shows many LUXXXX errors when decompressing the various downloads.
These errors can be caused if the LiveUpdate (LU) client version was notupgraded when SEP 12.1 RU1 was installed.
1) Uninstall LiveUpdate from the Control Panel > Programs and Features.
2) Clear the catalog file:
Go to Start > Run > type CMD
Enter the following command by browsing to the following location:-