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What’s AppInstallerFullTrustAppServiceClient.exe? Is it safe or a virus?

AppInstallerFullTrustAppServiceClient.exe is a system-related process by Microsoft Corporation that is part of the Windows App Installer infrastructure. It facilitates the execution and management of apps requiring elevated privileges or full trust capabilities, particularly when deploying or updating applications via the Windows Store or other trusted sources. This executable helps bridge communication between the App Installer and certain components of full-trust applications, ensuring secure and seamless operation. While this process runs in the background, it plays a crucial role in supporting the functionality and integrity of modern app installations and updates within the Windows environment.

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

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

Researched by Carl @ SpyShelter Labs

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More about AppInstallerFullTrustAppServiceClient.exe on WINDOWS

Who makes AppInstallerFullTrustAppServiceClient.exe?

We’ve found Microsoft Corporation should be the publisher of AppInstallerFullTrustAppServiceClient.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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