What is companionuser.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the companionuser.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for companionuser.exe related errors

Companionuser.exe file information

Windows Task Manager with companionuser
Companionuser.exe process in Windows Task Manager

The process known as Windows Live Messenger Companion User Elevation Helper belongs to software Windows Live Messenger Companion by Microsoft (

Description: Companionuser.exe is not essential for Windows and will often cause problems. Companionuser.exe is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 54,656 bytes. 
The program is not visible. The file is certified by a trustworthy company. It is not a Windows system file. Therefore the technical security rating is 36% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you are having problems with companionuser.exe, you may also do the following:
  1) uninstall Windows Live Essentials from your computer using the Control Panel applet Uninstall a Program
  2) go to the support area of the Live website
  3) make sure that you have installed the latest version.

Recommended: Identify companionuser.exe related errors

Important: Some malware camouflages itself as companionuser.exe. Therefore, you should check the companionuser.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

It's a virus
  FabioM.   (further information)

Summary: Average user rating of companionuser.exe: based on 1 vote with 1 user comment. One user thinks companionuser.exe is dangerous and recommends removing it.

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Best practices for resolving companionuser issues

A clean and tidy computer is the key requirement for avoiding problems with companionuser. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the companionuser.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

companionuser.exe [all]