AVG Anti-Virus is an effective free antivirus that provides real-time protection against viruses, spyware, rootkits, worms and phishing attempts. It was one of the first antiviruses to appear and has an impressive number of users. The 2011 version enhanced its popular LinkScanner feature to analyze links on Facebook and MySpace and improved scanning speed while maintaining an attractive and practical interface. Although its performance is less spectacular than other security suites, AVG Free maintains the values that have earned the trust of over a hundred million users worldwide as a classic free security option.