Download the latest security intelligence updates for Microsoft Defender Antivirus, Microsoft Security Essentials (MSE), System Center Endpoint Protection (SCEP) and other antimalware.

Keeping Microsoft Defender Antivirus up to date is critical to assure your devices are protected against new malware and attack techniques. Update your antivirus protection, even if Microsoft Defender …

This package includes monthly updates and fixes to the Microsoft Defender antimalware platform and engine that is used by Microsoft Defender Antivirus in Windows 11.

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If you have a pop-up blocker enabled, the Update Details window might not open. To open the Update Details window, configure your pop-blocker to allow pop-ups for this Web site.

Oct 21, 2019 · See Manage Microsoft Defender Antivirus updates and apply baselines article for an overview on how updates work, and how to configure other aspects of updates (such as scheduling …

If you have a pop-up blocker enabled, the Update Details window might not open. To open the Update Details window, configure your pop-blocker to allow pop-ups for this Web site.

Get security intelligence updates for Microsoft Defender Antivirus. Submit files and URLs for analysis. Give feedback about our detections. Read about viruses, malware, and other threats.

Jun 11, 2025 · Learn about the latest feature releases of Microsoft Defender for Endpoint on Windows Client and Server.

If you have a pop-up blocker enabled, the Update Details window might not open. To open the Update Details window, configure your pop-blocker to allow pop-ups for this Web site.