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What’s AM_Engine_Patch_1.1.24090.11.exe (AntiMalware Definition Update)? Is it safe or a virus?

AM_Engine_Patch_1.1.24090.11.exe by Microsoft Corporation is an update package designed to enhance the functionality and security of the Microsoft Defender Antimalware engine. Its primary purpose is to provide updated definitions and improvements to the scanning engine, enabling it to detect and respond more effectively to the latest malware threats. This file ensures that the antimalware software remains current, delivering optimal protection to systems running Windows. Regular updates like this are crucial for maintaining system security, as they address newly identified vulnerabilities and enhance overall malware detection capabilities. It is part of Microsoft's ongoing efforts to safeguard user systems.

Below are 4 simple steps you can take to see if the AM_Engine_Patch_1.1.24090.11.exe process is safe or malware.

  1. Scan the executable with Microsoft's built-in tech
  2. Find AM_Engine_Patch_1.1.24090.11.exe's publisher
  3. Search the executable's hash with VirusTotal
  4. Monitor the executable's behavior

Researched by Laura @ SpyShelter Labs

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More about AM_Engine_Patch_1.1.24090.11.exe on WINDOWS

Who makes AM_Engine_Patch_1.1.24090.11.exe (AntiMalware Definition Update)?

We’ve found Microsoft Corporation should be the publisher of AM_Engine_Patch_1.1.24090.11.exe.

How do we know? Our SpyShelter cybersecurity labs focuses on monitoring different types of Windows PC executables and their behaviors for our popular SpyShelter Antispyware software. Learn more about us, and how our cybersecurity team studies Windows PC executables/processes.

What does it mean if someone is the publisher of a PC .exe (executable or process)?

The publisher of an executable is the entity responsible for its distribution and authenticity. Most processes/executables on your PC should be signed. The signature on the executable should have been verified through a third party whose job it is to make sure the entity is who it says it is. Find an unsigned executable? You should consider scanning any completely unsigned .exe on your PC.

Last updated: March 10, 2025

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Why should you trust us?

Our team at SpyShelter has been studying Windows PC executables for over 15 years, to help fight against spyware, malware, and other threats. SpyShelter has been featured in publications like The Register, PC Magazine, and many others. Now we’re working to share free, actionable, and easy to understand information about Windows executables (processes) with the world, to help as many people as possible keep their devices safe. Learn more about us on our "About SpyShelter” page.

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