Hi, I had a similar problem, until I noticed that the installer complained about a file missing. The installer wants to run LUSETUP.EXE during install, so just download the newest LiveUpdate from Symantec, rename it LUSETUP.EXE and replace the original in the installer folder. Thanks, I only have these files in the install folder: data1.cab, SAV.msi, VDefhub.zip Is there more to it now? Isn't the LUSETUP.EXE in the SAV.msi? Also, do I need the msiexec /i before the actual command? as in msiexec /i c:\Apps\SAV\SAV.msi ADDLOCAL=SAVMain,SAVUI,SAVHelp,EMailTools,OutlookSnapin NETWORKTYPE=2 REBOOT=ReallySuppress /qn I am also using SAV build 10.1.4.4000 with the following command (using runonceex.cmd) "%systemdrive%\install\sav10\symantecantivirus.msi NetworkType=1 Servername=parentserver /qb" in the sav10 folder I have the pki folder (with certificate for parent server), 0x0409.ini, Data1.cab, grc.dat (from parent server), instmsiw.exe, lusetup.exe, setup.exe, setup.ini. symantecantivirus.msi, & vdefhub.zip I grabbed the grc.dat straight from the parent server's VPHOME share Works fine. Also install a point patch after the install completes and a reboot is done "%systemdrive%\install\sav10\sav10.1.4.4020.msp reboot=reallysuppress /qb"