What is companionuser.exe?

companionuser.exe is part of Windows Live Messenger Companion and developed by Microsoft Corporation according to the companionuser.exe version information.

companionuser.exe's description is "Windows Live Messenger Companion User Elevation Helper"

companionuser.exe is digitally signed by Microsoft Corporation.

companionuser.exe is usually located in the 'C:\Program Files\Windows Live\Companion\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about companionuser.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 companionuser.exe:

PropertyValue
Product nameWindows Live Messenger Companion
Company nameMicrosoft Corporation
File descriptionWindows Live Messenger Companion User Elevation Helper
Internal namecompanionuser.exe
Original filenamecompanionuser.exe
Legal copyright© Microsoft Corporation. All rights reserved.
Product version15.4.3555.0308
File version15.4.3555.0308

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

Product nameWindows Live Messenger Companion
Company nameMicrosoft Corporation
File descriptionWindows Live Messenger Companion Use..
Internal namecompanionuser.exe
Original filenamecompanionuser.exe
Legal copyright© Microsoft Corporation. All rights..
Product version15.4.3555.0308
File version15.4.3555.0308

Digital signatures [?]

companionuser.exe has a valid digital signature.

PropertyValue
Signer nameMicrosoft Corporation
Certificate issuer nameMicrosoft Code Signing PCA
Certificate serial number6101b29b000000000015

VirusTotal report

None of the 47 anti-virus programs at VirusTotal detected the companionuser.exe file.

None of the 47 anti-virus programs detected the companionuser.exe file.

Folder name variants

companionuser.exe may also be located in other folders than C:\Program Files\Windows Live\Companion\. The most common variants are listed below:

Hashes [?]

PropertyValue
MD5d28cf84a1cd2e6d9bf91c50c589ee437
SHA25653ab6c0e787d60e3e19712af541e39b551449eb892eda4b10dd01e652046c607

Error Messages

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

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

companionuser.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.

Windows Live Messenger Companion User Elevation Helper has stopped working.

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

companionuser.exe is not a valid Win32 application.

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

What will you do with the file?

To help other users, please let us know what you will do with the file:



What did other users do?

The poll result listed below shows what users chose to do with the file. 100% have voted for removal. Based on votes from 2 users.

Votes
Keep0 %
0
Remove100 %
2

NOTE: Please do not use this poll as the only source of input to determine what you will do with the file. Only 2 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


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Comments

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.

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