https://www.av-test.org/en/antivirus/home-windows/windows-10/june-2019/
https://www.av-test.org/en/antivirus/home-windows/windows-10/june-2019/microsoft-windows-defender-4.18-192315/

https://www.av-test.org/en/antivirus/home-users/

　　　 Protection　Performance　Usability
June 2019: 6　　6　　6
June 2018: 6　　5.5　6
June 2017: 5.5　5　　4.5
June 2016: 4　　5.5　5.5
June 2015: 0.5　3　　6
June 2014: 0.5　3　　6
June 2013: 0　　3.5　6
June 2012: 2.5　5.5　5.5
June 2011: 2.5　4.5　5
June 2010: 4　　4.5　5.5