viruses and 0-day / malware attacks. On December 1, 2021, AV-TEST gave Defender a maximum protection score of 34 points after successfully managing to detect ten out of ten ransomware samples in a lab test. See also Security and safety features new to Windows Vista Windows Security Center Notes References External links 2006 software Microsoft software Microsoft Windows security technology Spyware removal Windows components Windows-only freeware Windows security software