About Microsoft Defender Antivirus

Microsoft Defender Antivirus is an antivirus software component for Microsoft Windows and mobile. It was first released as a downloadable free anti-spyware program for Windows XP and was shipped with Windows Vista and Windows 7. It has evolved into a full antivirus program, replacing Microsoft Security Essentials in downloadable genuine copies of Windows XP to Windows 7.

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Facts from Wikidata (CC0). Image by Microsoft Corporation via Wikimedia Commons (Public domain).

Microsoft Defender Antivirus

antivirus app, component of Windows Vista and later

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