Symantec Endpoint Protection client

The .msi options are taken from the "Installation Guide for Symantec(TM) Endpoint Protection and Symantec Network Access Control".

The %SOFTWARE%\symantec folder contains all files from the SEP folder.

<package id="symantec"
  name="Symantec Endpoint Protection client"
  revision="11"
  reboot="false"
  priority="1">
  <check type="uninstall" condition="exists" path="Symantec Endpoint Protection" />
  <install cmd='msiexec.exe /i "%SOFTWARE%\symantec\Symantec Antivirus.msi" ADDLOCAL=Core,SAVMain,PTPMain,COHMain,ITPMain REBOOT=ReallySuppress /qn /l*v %TEMP%\symantec.log' />
  <remove cmd='msiexec.exe /I{2EFCC193-D915-4CCB-9201-31773A27BC06} /qn' />
</package>

I use this

<package id="symantec"
  name="Symantec Endpoint Protection client"
  revision="12"
  reboot="false"
  priority="1">
  <check type="uninstall" condition="exists" path="Symantec Endpoint Protection" />
  <install cmd='msiexec.exe /i "%SOFTWARE%\AntivirusProgram\Symantec_Endpoint_Protection_12.1_Win32-bit_Client_EN\sep.msi" REBOOT=ReallySuppress /qn /l*v %TEMP%\symantec.log' architecture="x86"/>
  <install cmd='msiexec.exe /i "%SOFTWARE%\AntivirusProgram\Symantec_Endpoint_Protection_12.1_Win64-bit_Client_EN\Sep64.msi" REBOOT=ReallySuppress /qn /l*v %TEMP%\symantec.log' architecture="x64"/>
  <remove cmd='msiexec.exe /I{87C925D6-F6BF-4FBD-840B-53BAE2648B7B} /qn' /> 
</package>

Also see http://www.symantec.com/business/support/index?page=content&id=TECH102668

Uninstall without password prompt see: http://andrewblock.net/2011/03/07/how-to-uninstall-symantec-endpoint-protection-11-without-the-uninstall-password/