Best free antivirus 2018

5- Avira Free Antivirus: This AntiVirus provides users with the most comprehensive features, and it will go into different parts of the computer and makes slower the system than the other anti-viruses we mentioned. The free version of the Avira Anti-Virus has an internal VPN and is equipped with tools for adjusting and optimizing the system. Avira Antivirus may slow down your system performance, but it detects 99.7% of Internet threats.