Sav virus definitions not updating
To run Live Update on a primary server from the Symantec System Center Console Schedule Updates from within Symantec Anti Virus.
The Live Update Administration Utility 1.x and Live Update Administrator 2.x On very large or widely distributed networks, it may be desirable to create an internal server and have clients use Live Update to retrieve updates from that server, rather than using the VDTM.
Symantec offers two distinct products for downloading and distributing Live Update content on an internal network.
If the database server is out of space or if the table used to store definitions has reached its quota, there will likely be error messages in the Windows Event Logs.
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.
Read the document How to use Live Update is a program that connects to a server, downloads the latest definitions, and applies the definitions to the computer on which it is running.