!. Uninstall Liveupdate 3.3 from add/remove programs
2. Delete all the liveupdate folders: From C:/Documents and settings/Al users/Application Data/Symantec, and from C:/program files/Symantec( If present).
3. Re-install Liveupdate, by running LUSETUP.EXe from the SEP folder, inside CD1/DVD
4. Repair Symantec Endpoint Protection from add/remove programs.