Explains how to download the latest antimalware definition updates for Microsoft Forefront Client Security, Microsoft Forefront Endpoint Protection 2010 or Microsoft System Center 2012 Endpoint Protection without installing Microsoft Windows Server Update Services (WSUS).

The latest beta malicious software definition update gives you early access to definitions for critical infections that the latest release version of the definitions does not detect or clean. You can use these beta definitions to clean infected computers.

This article describes an anti-malware platform update package for the following clients on the Windows 10 and Windows Server 2016 operating systems: Microsoft System Center 2012 R2 Configuration Manager Endpoint Protection Service Pack 1 (SP1) clients. Microsoft System Center 2012 Endpoint Protection Service Pack 2 (SP2) clients.

Download the Microsoft Security Essentials virus and spyware definition update file that is appropriate for your version of Windows: Download the file for a 32-bit (x86-based) version of Windows. Download the file for a 64-bit version of Windows.

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. This package should be applied offline on Windows Images/VHD (x) file.

This article describes an anti-malware platform update package for both Microsoft System Center 2012 Endpoint Protection Service Pack 1 (SP1) clients and Microsoft Forefront Endpoint Protection 2010 clients. These packages update Endpoint Protection client services, drivers, and user interface components.

Refunds for digital games include Microsoft Store digital game offers, Xbox apps (excluding movies and TV apps), digital gaming bundle offers, digital game durable content, and some digital game consumable content, whether made available through the Xbox console, on your PC, or on your mobile device.

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：

Each release of the tool helps detect and remove current, prevalent malicious software. This malicious software includes viruses, worms, and Trojan horses. Microsoft uses several metrics to determine the prevalence of a malicious software family and the damage that can be associated with it.

Open the Surface app. In the Surface app, expand Help & support to check if the update status is "You're up to date" or something else. If needed, select the option to update the devices. Note: If you don't have the Surface app installed, you can download the Surface app from the Microsoft Store.