Facebook offers antivirus and security programs in their own Marketplace. Software products that come from Microsoft, McAfee and Sophos. The Inquirer reports, cooperation with a number of security companies that will offer malware protection at 900 million users. Facebook users can download copies of the software license at no cost. '' Nothing is more important than the safety of people using Facebook, and the security of their data. Facebook Security Team has pioneered many innovative defense systems against viruses, spam and phishing attacks. In addition, an automatic mechanism that is quickly closing the malicious page, account and application'' wrote in a blog post up. '' We believe that arming our users with antivirus software will help keep them safe'' .