The name of the process that is loaded onto the system through the executable file companionuser.exe is Windows Live Messenger Companion User Elevation Helper. This is a process that is part of the software that installs Windows Live Messenger Companion. This is a legitimate file validated by Microsoft Corporation. For product and file version 15.4.3555.308, file size is 54,656 bytes. File directory is C:\Program Files\Windows Live\Companion\companionuser.exe. There appears to be very little data concerning the actual functions of the file. Users mostly notice the file running in their Task Manager window whenever they use Internet Explorer as their Web browser, and clicking on the Properties option for the file does reveal that it is indeed part of Windows Live Messenger, with internal and original file name of companionuser.exe. At any rate, there were no significant reports citing the file as executing a malicious process, or the file being a resource hog. Overall, the file is considered as not dangerous.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. companionuser.exe. is used by Windows Live Messenger Companion User Elevation Helper, If you shut down companionuser.exe, it will likely start again at a later time either after you restart your computer or after an application start. To stop companionuser.exe, permanently you need to uninstall the application that runs this process which in this case is Windows Live Messenger Companion User Elevation Helper, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed companionuser.exe

A process usually a part of an installed application such as Windows Live Messenger Companion User Elevation Helper, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if companionuser.exe. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that companionuser.exe, belongs to, in this case Windows Live Messenger Companion User Elevation Helper