Protecting your computer system is a job that Symantec's Norton Antivirus 2012 does best by integrating SONAR 4 Behavioural Protection and Download Insight 2.0 features. Highlights ' Version ' Norton Antivirus 2012 ' System Requirements - Microsoft Windows XP; Microsoft Windows Vista; Microsoft Windows 7 Operating Systems ' Hardware Requirements ' 300MHz to 1GHz CPU, 256MB RAM, 300MB Hard Disk Space, CD/DVD ROM drive ' No. of Users ' 1 It's no wonder that Norton has earned its credo based on efficient protection from web-based threats. Providing cutting-edge security features, such as SONAR 4 Behavioural Protection and Download Insight 2.0, this antivirus software is an ace at deterring all virus threats, new and old. Resolving your obscurity while chatting, emailing and sharing files, it also provides browser protection, network threat protection and vulnerability protection. Norton also notifies you if there is any threat of damage or infection to your PC. The 2012 edition of Norton Antivirus comes with a single user license.