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What’s MdRes.exe (Windows Memory Diagnostic)? Is it safe or a virus?

MdRes.exe is a system utility by Microsoft Windows, associated with the Windows Memory Diagnostic tool. It is designed to test the computer's RAM for hardware defects or memory-related problems that might affect system performance or cause errors. When executed, it runs diagnostic tests during the system boot process to detect memory issues such as faulty RAM modules or data corruption. Users can initiate this tool manually, and it operates outside the operating system environment to ensure comprehensive testing. Results from the diagnostic process are displayed once complete, helping users troubleshoot and address memory-related problems effectively.

Researched by Laura @ SpyShelter Labs

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More about MdRes.exe on WINDOWS

Who makes MdRes.exe (Windows Memory Diagnostic)?

We’ve found Microsoft Windows should be the publisher of MdRes.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 13, 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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