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Windows Defender - Wikipedia, the free encyclopediaWindows Defender was released with Windows Vista and Windows 7, serving as their built-in antispyware component. Windows Defender is superseded by Microsoft Security Essentials, an antimalware product from Microsoft which provides protection against a wider range of malware. Upon installation, Microsoft Security Essentials disables Windows Defender and takes over its duty.[8][9][10] In Windows 8, Microsoft upgraded Windows Defender into an antivirus program comparable to Microsoft Security Essentials.[11] This new Windows Defender greatly resembles Microsoft Security Essentials and uses the same virus definition updates. As a result, Microsoft Security Essentials is not compatible with Windows 8.
There is a PUP detection registry tweak for Win10 WD. Use at own riskWhats Microsoft stand on PUP?
Does WD on Win 10 detects PUP?