Problem:
When Trying to Install SEP in Win 7 bit and Win 2008 R2 64 bit Error : "Symantec Endpoint Protection cannot be installed without 32-bit application Support"
Cause :
The 32-bit subsystem support has been removed from the server, either manually or through an automated build process.
Solution:
In order Check Whether the 32-bit subsystem is Enabled or Disabled,
This can be confirmed by running the following command:
"dism /online /get-features /format:table "
Use this Command for Enabling the 32-bit subsytem
"dism /online /enable-feature /featurename:ServerCore-WOW64"
Or
Reinstall the OS and by default the 32-bit subsytem will be enabled.
Reference :http://support.microsoft.com/kb/974727