I am sorry if this has been covered before: I've only briefly used the free version (PersonalEdition Classic) before. But recently I switched from NOD32 to AntiVir PersonalEdition Premium (which was cheap, by the way ). I was thinking perhaps it is superior to NOD32 (at least detection-wise)? But then I don't know if AntiVir has HTTP scanning capabilities? (Protecting from malicious scripts on web sites before they even reach your PC.) And what about rootkits? NOD32 has the "Anti-Stealth Technology", but what does AntiVir have?