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June 23, 2025

Microsoft Rolls Out New Defender Update for Windows 11, 10, and Server Install Images

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Microsoft has launched a new update for Microsoft Defender that specifically targets Windows 11, Windows 10, and Windows Server installation images. This update follows a prior patch that addressed a security vulnerability in Lumma. The primary goal of the update is to enhance the anti-malware tools included in the installation media, which can often be outdated, posing a security risk when new systems are set up.

The updated Defender package integrates the latest definitions and software components into the installation images, thus ensuring better protection against threats immediately upon installation.

Update Details

  • Defender package version: 1.431.54.0
  • Platform version: 4.18.25050.5
  • Engine version: 1.1.25050.2
  • Security intelligence version: 1.431.54.0

Applicable Platforms:

  • Windows 11
  • Windows 10 (Home, Pro, Enterprise)
  • Windows Server 2022
  • Windows Server 2019
  • Windows Server 2016

The update bolsters detection capabilities against various threats, including trojans and backdoor exploits. It is worth noting that while the current version of Microsoft Defender’s intelligence update is 1.431.155.0, this new package is intended solely for fresh installations. Along with addressing early vulnerabilities, Microsoft claims that these updates may also enhance performance on certain systems post-installation.

For more information on this update, you can visit the official Microsoft documentation here.


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