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 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.

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.

This article discusses how to update the Malware Protection Engine. The article provides details about prerequisites, restart requirements, removal information, and how to verify that the updates were installed correctly.

Then follow these steps: 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 article describes antimalware update package for Microsoft Defender in the OS installation images (WIM and VHD files). This feature supports the following OS installation images: Windows 11. Windows 10 (Enterprise, Pro, and Home editions) Windows Server 2022. Windows Server 2019.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

The tool removes malicious software from an already-infected computer. Antivirus products block malicious software from running on a computer. It is significantly more desirable to block malicious software from running on a computer than to remove it after infection.

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.