To download the Microsoft Forefront Client Security, the Microsoft Forefront Endpoint Protection 2010, or the Microsoft System Center 2012 Endpoint Protection antimalware definition update file (Mpam-fe.exe) for 32-bit (x86-based) versions of Windows, click the following link:

To download the Microsoft Forefront Client Security beta malicious software definition update for 32-bit (x86-based) versions of Windows, click the following link:

To download the Microsoft Forefront Client Security, the Microsoft Forefront Endpoint Protection 2010, or the Microsoft System Center 2012 Endpoint Protection antimalware definition update file (Mpam-fe.exe) for 32-bit (x86-based) versions of Windows, click the following link:

Discusses how to update the Microsoft Malware Protection Engine, including prerequisites, restart, and removal, and how to verify that the updates were installed correctly.

Extract this .zip file to get the Defender update package (defender-dism- [x86|x64|arm].cab) and an updating tool (DefenderUpdateWinimage.ps1) that assists the update operation for OS installation images. The following prerequisites apply to running this updating tool (DefenderUpdateWinImage.ps1):

As part of this effort, Microsoft Windows Defender regularly downloads updates to the definition files that are used to identify spyware and other potentially unwanted software. Windows Defender may also periodically download detection engine updates.

Provides a new protection capability that combines suspicious network activity with other suspicious behavior monitoring already included in the product triggering telemetry and sample submission for suspicious files that may require further analysis.

Describes an anti-malware platform update package for System Center 2012 R2 Configuration Manager Endpoint Protection SP1 clients, System Center 2012 Endpoint Protection SP2 clients, and System Center Configuration Manager, current branch.

若要下载 Microsoft Forefront Client Security、Microsoft Forefront Endpoint Protection 2010 或 Microsoft System Center 2012 Endpoint Protection 反恶意软件定义更新文件 (Mpam-fe.exe) （适用于 32 位 (基于 x86 的 Windows) 版本），请单击以下链接：

Para instalar la actualización de definiciones en modo silencioso, escriba el siguiente comando: Mpam-fe.exe -q Nota: Debe usar una cuenta que tenga derechos de administrador para ejecutar este comando. 1.) Guardar o ejecutar las definiciones del sistema.