Best Free Antivirus Software

      

      

1. AVG Antivirus

The AVG Antivirus free 2013 software is the industry standard when it comes to free, easy-to-download antivirus software. It's exceptional at blocking malware, and the setup is painless; you can access the download and setup malware protection in under five minutes. AVG is compatible with most operating systems, from Windows to Linux to Mac OS.