Download the latest free virus definition files and update Defender antivirus

Windows Defender Definitions (32-bit)

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Download Windows Defender Definitions (32-bit)

Windows Defender Definitions (32-bit)

  -  131 MB  -  Freeware
  • Latest Version

    Windows Defender Definitions (32-bit) LATEST

  • Operating System

    Windows 8 / Windows 10 / Windows 11

  • User Rating

    Click to vote
  • Author / Product

    Microsoft Corporation / External Link

  • Old Versions

  • Filename

    mpam-fe.exe

Windows Defender Definitions, also known as Microsoft Defender Antivirus Definitions, are regularly updated files that contain information about known malware, viruses, spyware, and other malicious software. These definitions serve as a key component of Windows Defender, the built-in antivirus and antimalware solution provided by Microsoft.

The purpose of Windows Defender Definitions is to keep the antivirus software up to date with the latest threats. As new malware and malicious activities emerge, Microsoft continuously analyzes and identifies them, creating specific definitions to detect and remove these threats from infected systems.

It includes signatures, behavioral patterns, heuristics, and other indicators that help Windows Defender identify and protect against various types of malware. The definitions are regularly updated to ensure the antivirus software can effectively detect and block the latest threats.

Updates to Windows Defender Definitions can be obtained through automatic updates via Windows Update. These updates are typically released on a regular basis, sometimes multiple times a day, to ensure that Windows Defender remains capable of detecting and protecting against newly identified threats.

In addition to automatic updates, users can also manually trigger updates to download and apply the latest Windows Defender Definitions. This option is especially useful if there are issues with automatic updates or if immediate protection against a specific threat is required.

By regularly updating Windows Defender Definitions, users can enhance the effectiveness of their antivirus protection, ensuring that their systems are well-guarded against the ever-evolving landscape of malware and security threats.

Also Available: Windows Defender Definitions (64-bit)

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