HOWTO: Install Symantec Corporate Edition with latest definitions

Take three files from the installation distribution.

Data1.cab
Symantec AntiVirus.msi
VDefHub.zip

go to Symantec, get the latest definitions

ftp://ftp.symantec.com/public/english_us_canada/antivirus_definitions/norton_antivirus/

Specifically look for a filename that ends in -i32.exe: 20091213-20-i32.exe

Note: Do not use xxxxxxxxv5i32.exe they will not work.

Extract the contents of the .exe (eg. using WinRAR), remove VIRSCAN.ZIP from and rename it to VDefHub.zip

replace the file in your installation folder.

Ok, you're all set. use this command, it installs silent, no reboot
"Symantec AntiVirus.msi /passive RUNLIVEUPDATE=0 REBOOT=REALLYSUPPRESS

Reference: http://www.msfn.org/board/lofiversion/index.php/t50679.html