Avira Free Antivirus is a very popular free antivirus with solid protection. Avira quite often wins first places in various tests and receives awards. Main features of Avira Free Antivirus: Virus scanner (protection against ransomware, viruses, trojans, etc.); Treatment and blocking of infected files; Blocking potentially unwanted programs. The disadvantages include the fact that it has a not entirely clear interface and therefore not very convenient, as well as the fact that it uses advertising more and more actively than others and imposes its products. Official page - https://www.avira.com/en/free-antivirus-windows