Thanks, but I but I want to know if it's really doing anything. It may be installed, but still not compatable and thus, not really doing threat protection like it does on x86 operating systems. Before MR3 you could install it, and someitmes it would say it was getting defs on x64, or just say waiting for updates.
Hoping a Symantec employee would chime in here. I would think Symantec would be posting this in the release notes or updating their knowledge base articles if it was in fact 100% working and supported.
The system logs for proactive threat protection are blank on the clients I am testing so it's hard to tell for me.