Microsoft Defender recently did quite poorly in AV-TEST's performance impact test. However, the product was one of the best in AV-Comparatives' web protection test alongside the likes of Kaspersky.
Microsoft Defender offers great protection from malware -- but there are other online threats you might want to consider, too ...
Compare the best free antivirus tools for Windows 10 in 2026, including real-time malware protection, phishing defense, ...
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