You can run Live Update from the Symantec System Center, or within Symantec Anti Virus.To run Live Update from the Symantec System Center Console Scheduling Live Update You can schedule Live Update to run periodically, either from the Virus Definition Manager within the Symantec System Center, or by clicking File and then Schedule Updates from within Symantec Anti Virus.Virus definition files essentially contain unique segments referred as signatures.
The server gets definitions updates using Live Update or an file, and then automatically distributes the definitions to each of its clients on the network.
Therefore, in order to protect a system, the virus definition files must always be kept current.
The next step in the process is to decide how to obtain the files, how to update the client computers within a corporate environment, and how often to perform these updates.
Running Live Update (the first option below) is usually the easiest and most effective, but other options are available.
Using one method of updating does not preclude the other.