Protect your PC from the latest threatsThe best free antivirus1. BitDefender Antivirus Free Edition2. Avast Free Antivirus3. Sophos Home4. Avira Free Antivirus5. AVG Antivirus FreeRead on for our detailed analysis of each antivirus suiteIt's fair to suggest that Windows' built-in AV solution, Windows Defender, is the last free AV app you should trust...