Windows Defenderは誤検知率もかなり高い
最新のAV-Comparativesでは誤検知率、23/230でなんと10%

AV-Comparatives 総合防御力テスト
2018年11月　サンプル数=230、()内は誤検出数
https://www.av-comparatives.org/comparison/
https://i.imgur.com/MyQ20VN.png

100.0% Tencent
100.0% Avast(2), AVG(2), Avira(2), Bullguard(2)
100.0% McAfee(5)
100.0% F-Secure(11)
99.80% K7(3)
99.60% Bitdefender, Vipre
99.60% ESET(1)
99.60% TrendMicro(12)
99.60% Panda(13)
99.10% Symantec(10)
99.10% Emsisoft, Kaspersky
98.70% QuickHeal(2)
96.50% WindowsDefender(23)