Antivirus and other security solutions often fish with their interface a bit difficult for the general public: that responding to an alarm firewall ? How to run a system scan ? For those using a security solution that repels , Symantec offers Norton 360 an all-in - one designed to do the work for you during periods of inactivity on your computer. Can any body know hat what is the difference between Norton AntiVirus 2011 vs. Norton 360 4.0 ? Please suggest.