Hi there, I believe that ZoneAlarm Pro [latest version---> 8.0.298] is compatible with Windows Vista 64-bit. I'm not sure if the free version works on x64, though. Hope this helps. Regards, Carlos
If you want a good proactive defense: Outpost. It's brilliant although I don't like it that its handling is rather the one of a behavior blocker than of a HIPS (especially in the pop ups). That's why I use Comodo, although Outpost is partially much better (more ring 0 hooking).