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What does the usnsvc.exe file do?

The usnsvc.exe process is also known as Messenger Sharing USN Journal Reader Service and is a part of Windows Live Messenger. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of usnsvc.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about usnsvc.exe usnsvc.exe

usnsvc.exe is not a Windows system file and is known to frequently cause computer problems. The file usnsvc.exe is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 98,328 bytes (72% of all these files), 97,136 bytes, 39,936 bytes, 98,672 bytes or, as the case may be, 98,840 bytes.
The program executes in the background, and can only be terminated using Windows Task Manager. The usnsvc file is not part of the Windows operating system. The original file has a digital certificate (see its file properties). To remove the file and its related software from your computer, click Programs in Control Panel For this reason, 24% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

A usnsvc.exe file has a 85% certainty of being dangerous if it is found in the C:\Windows directory. In this case, the file size is usually 112,128 bytes. This file contains no information about the producer or the version. It is interesting to note that the file is placed in the Windows folder, even though it is not part of the operating system. This usnsvc.exe process does not have a visible window, and does not appear on the taskbar. The usnsvc file is not part of the Windows operating system.

A usnsvc.exe file has a 90% certainty of being dangerous if it is found in the C:\Windows\System32 directory. In this case, the file size is usually 38,912 bytes. File properties have not been internally documented by the producer or developer. The file is not a Windows system file, but it is nontheless located in the C:\Windows folder. The application does not appear as a visible window, but only in Task Manager. This process can initiate a network connection--either to the Internet or on your LAN. Usnsvc.exe is no part of Microsoft Windows. Usnsvc.exe is capable of hides its presence from system tools as well as supervise programs.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves usnsvc.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about usnsvc?

MSN Messenger
It's a part of MSN Messenger. "Messenger Sharing USN Journal Reader service"
Processus de Windows Live Messenger (MSN 8)
Part of MSN Messanger and Windows Live Messanger
French MSN Virus. Comming from N039_jpg (folder with a command file)
Kristian Høsøien Hau

Summary: 6 users judge usnsvc.exe to be an essential file that should not be touched. 2 users consider it harmless. However, one user considers this to be a suspicious process and would like to get rid of it. For this reason, 3 users have already deleted usnsvc.exe. source: file.net

How to uninstall Windows Live Messenger

usnsvc.exe usnsvc.exe fix

To remove usnsvc.exe from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Windows Live Messenger in the list of available programs.
  5. Click Uninstall.

How to tell if usnsvc.exe (usnsvc.exe) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of usnsvc.exe. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for usnsvc.exe or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or usnsvc.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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