"For x64 version of Windows, SEP firewall will not function, so do not install". May , as you say be incorrect. But was once true.
"There are certain portions of x64 implementation within NTP that still neeed to be addressed by Symantec."
Q: Why doesn't Device Control work on Windows Vista 64-bit?
A: Device Control will not work on a client running the 64-bit version of Windows Vista 64-bit. Windows Vista's Patch Guard prevents this action .
The Device Control feature does not currently exist on any 64-bit platforms.
Device control as I understand it, is part of NTP.
I apologize for tossing the Firewall component in the mix.
* I OFTEN forget, Firewall is not part of the NTP component *