Commonly Compared
Ranked in these QuestionsQuestion Ranking
Pros
Pro No Ads
Pro 100% Detection Rate (according to AV-Test)
As of March 2021, Defender has been scoring perfect 6 in AV-Test ratings in all 3 categories for almost a year. The last time it scored a non-perfect score was in April 2020 which was a long time ago.
Pro Part of Windows
Pro Lightweight
Cons
Con It doesn't even get anything
Con Harder to set exceptions and restore for false positives
Defender and its options isn't as accessible as other av programs.