LIVEUPDATE file format is used by the Symantec software application. This file format is used to update the virus definition of the antivirus or to add a new security update to the antivirus.

The LIVEUPDATE file format is used as a log file which allows the antivirus to keep track of the virus definitions so that the antivirus is able to detect the virus or any other malicious element when scanning the directory. This LIVEUPDATE file is used to add new virus definitions to the already available in the software data files. This update file can also have new security update for the software application.