Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

Protect your privacy, identity, and devices with Windows Security. Explore Windows 11 security features like Microsoft Defender Antivirus that help keep you and your PC safe.

To get started, download the app and login with your Microsoft account. A valid Microsoft 365 Personal or Family subscription is required to activate Defender on your devices.

One of the key benefits of the Windows Security app is its ability to provide real-time protection. Microsoft Defender Antivirus continuously scans your device for potential threats and takes …

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

Oct 7, 2024 · Fix Windows Update corruptions and installation failures - Windows Server Use the DISM tool to fix problems that prevent Windows Update from installing successfully. The …

May 13, 2025 · There’s potential danger if you disable Windows defender on Windows 11 and don’t have another security measure. So, only do it if you know what you’re doing, or you’re …

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.

Learn about getting started with the new Microsoft Defender on your personal devices including Windows, Mac, Android, and iOS.

Jun 17, 2025 · Learn how to troubleshoot problems with Windows Defender and Endpoint Protection. Enable and update Microsoft Defender Antivirus on Windows Server - Microsoft …