What is msmpeng.exe?

msmpeng.exe is part of Microsoft Malware Protection and developed by Microsoft Corporation according to the msmpeng.exe version information.

msmpeng.exe's description is "Antimalware Service Executable"

msmpeng.exe is digitally signed by Microsoft Corporation.

msmpeng.exe is usually located in the 'c:\program files\microsoft security client\' folder.

Some of the anti-virus scanners at VirusTotal detected msmpeng.exe.

If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.

Vendor and version information [?]

The following is the available information on msmpeng.exe:

Product nameMicrosoft Malware Protection
Company nameMicrosoft Corporation
File descriptionAntimalware Service Executable
Internal nameMsMpEng.exe
Original filenameMsMpEng.exe
Legal copyright© Microsoft Corporation. All rights reserved.
Product version4.4.0304.0
File version4.4.0304.0

Here's a screenshot of the file properties when displayed by Windows Explorer:

Product nameMicrosoft Malware Protection
Company nameMicrosoft Corporation
File descriptionAntimalware Service Executable
Internal nameMsMpEng.exe
Original filenameMsMpEng.exe
Legal copyright© Microsoft Corporation. All right..
Product version4.4.0304.0
File version4.4.0304.0

Digital signatures [?]

msmpeng.exe has a valid digital signature.

Signer nameMicrosoft Corporation
Certificate issuer nameMicrosoft Code Signing PCA
Certificate serial number33000000adc6484c2dcb9a424c0001000000ad

VirusTotal report

1 of the 49 anti-virus programs at VirusTotal detected the msmpeng.exe file. That's a 2% detection rate.

ScannerDetection Name
Rising PE:Malware.XPACK/RDM!5.1
1 of the 49 anti-virus programs detected the msmpeng.exe file.

Folder name variants

msmpeng.exe may also be located in other folders than c:\program files\microsoft security client\. The most common variants are listed below:

Other files also named msmpeng.exe

msmpeng.exe (27 votes)

Hashes [?]


Error Messages

These are some of the error messages that can appear related to msmpeng.exe:

msmpeng.exe has encountered a problem and needs to close. We are sorry for the inconvenience.

msmpeng.exe - Application Error. The instruction at "0xXXXXXXXX" referenced memory at "0xXXXXXXXX". The memory could not be "read/written". Click on OK to terminate the program.

Antimalware Service Executable has stopped working.

End Program - msmpeng.exe. This program is not responding.

msmpeng.exe is not a valid Win32 application.

msmpeng.exe - Application Error. The application failed to initialize properly (0xXXXXXXXX). Click OK to terminate the application.

What will you do with msmpeng.exe?

To help other users, please let us know what you will do with msmpeng.exe:

What did other users do?

The poll result listed below shows what users chose to do with msmpeng.exe. 33% have voted for removal. Based on votes from 3 users.

User vote results: There were 1 vote to remove and 2 votes to keep

NOTE: Please do not use this poll as the only source of input to determine what you will do with msmpeng.exe. Only 3 users has voted so far so it does not offer a high degree of confidence.

Malware or legitimate?

If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.

Please select the option that best describe your thoughts on the information provided on this web page

Free online surveys

And now some shameless self promotion ;)

A screenshot of FreeFixer's scan result.Hi, my name is Roger Karlsson. I've been running this website since 2006. I want to let you know about the FreeFixer program. FreeFixer is a freeware tool that analyzes your system and let you manually identify unwanted programs. Once you've identified some malware files, FreeFixer is pretty good at removing them. You can download FreeFixer here. It runs on Windows 2000/XP/2003/2008/2016/2019/Vista/7/8/8.1/10. Supports both 32- and 64-bit Windows.

If you have questions, feedback on FreeFixer or the freefixer.com website, need help analyzing FreeFixer's scan result or just want to say hello, please contact me. You can find my email address at the contact page.


Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.

I'm reading all new comments so don't hesitate to post a question about the file. If I don't have the answer perhaps another user can help you.

No comments posted yet.

Leave a reply