MajorGeeks.Com » Antivirus & Malware » Anti-Malware Definition Updates » Microsoft Defender Update for Windows Operating System Installation Images - April 2026 » Download Now

Microsoft Defender Update for Windows Operating System Installation Images - April 2026

Author: Microsoft Corp
Date: 04/01/2026
Size: 220 MB
License: Freeware
Requires: 11|10
Downloads: 11125 times

TIP: Click Here to Repair or
Restore Missing Windows Files

Download (32-Bit)
Download (64-Bit)

MajorGeeks: Setting the standard for editor-tested, trusted, and secure downloads since 2002.

Avast Free Antivirus Worried about finance scams?
Get free antivirus with AI-powered online scam detection Download Free!

-= advertisement =-

Microsoft Defender Update for Windows Operating System Installation Images is a monthly update to patch your operating system images and protect you from malware and viruses when deploying your images when your images are over a month old.

Microsoft Defender Update for Windows Operating System Installation Images updates the anti-malware client, anti-malware engine, and signature versions in the OS installation images for Windows 10 (Enterprise, Pro, and Home editions), Windows Server 2019, and Windows Server 2016. This package also includes the latest security intelligence update available up to the date of release.

Install:
PS C:\> DefenderUpdateWinImage.ps1 - WorkingDirectory -Action AddUpdate - ImagePath -Package

Remove or rollback:
PS C:\> DefenderUpdateWinImage.ps1 - WorkingDirectory -Action RemoveUpdate - ImagePath

List details of the update:
PS C:\> DefenderUpdateWinImage.ps1 - WorkingDirectory -Action ShowUpdate - ImagePath

Similar:
● How to Pause or Delay Windows 10 & 11 Major (Feature) Updates
● Will Windows 10 Receive Windows Updates if It's Not Activated?
● How to Enable or Disable Update Other Microsoft Products When You Update Windows

Limitations:
Must be installed from a 64-Bit operating system. Do not use this on live images.

Screenshot for Microsoft Defender Update for Windows Operating System Installation Images

Official Download Mirror for Microsoft Defender Update for Windows Operating System Installation Images

Top Downloads In Anti-Malware Definition Updates

Malwarebytes Database June 2, 2020 [ 2020-06-01 05:43:23 | 18.3 MB | Freeware | 10|8|7|Vista|XP | 5 ]

Malwarebytes Database can update your Malwarebytes Database when the online update fails, or malware prevents it. Video tutorial available. Malwarebytes no longer offers an offline database.

Spybot Search and Destroy Update March 27, 2026 [ 2026-03-27 01:00:00 | 8 MB | Freeware | 11|10|8|7 | 5 ]

The Spybot Search and Destroy Update is freeware intended for updating your detections without the need for the included WebUpdate. Video tutorial available.

SUPERAntiSpyware Database Definitions April 2, 2026 [ 2026-04-02 01:00:01 | 371 MB | Freeware | 11|10|8|7 | 4 ]

SUPERAntiSpyware Database Definitions allow you to update both versions of SUPERAntiSpyware to the latest definitions.

IObit Malware Fighter Offline Database July 23, 2020 [ 2020-07-27 10:24:41 | 8 MB | Freeware | 10|8|7 | 4 ]

IObit Malware Fighter Offline Database is an offline database for IObit Malware Fighter to update a computer that's offline or won't update automatically. Download the latest IObit Malware Fighter here.

Microsoft Defender Update for Windows Operating System Installation Images - April 2026 [ 2026-04-02 01:00:03 | 220 MB | Freeware | 11|10 | 5 ]

Tactical Briefings

Comment Rules & Etiquette - We welcome all comments from our readers, but any comment section requires some moderation. Some posts are auto-moderated to reduce spam, including links and swear words. When you make a post, and it does not appear, it went into moderation. We are emailed when posts are marked as spam and respond ASAP. Some posts might be deleted to reduce clutter. Examples include religion, politics, and comments about listing errors (after we fix the problem and upvote your comment). Finally, be nice. Thank you for choosing MajorGeeks.