Performance Services - usnsvc.exe - Service - Messenger Sharing USN Journal Reader Service

Execution command: C:\Program Files\MSN Messenger\usnsvc.exe

This service is installed as part of Microsoft Live Messenger. If you are using it, you should leave it running in "Manual" mode.

This is mentioned at nambulous.wordpress.com that:

... However, the well known service (Messenger Sharing USN Journal Reader service) was modified further. It's now running all the time (check the task manager for a usnsvc.exe) and not only when WLM is active. Older WLM versions started and stopped the service with every WLM session.

Someone reported to have a hard time to delete usnsvc.exe from the file system because it is defined as a process and possibly in running status. If that the case, just delete usnsvc.exe from the service registry. Read more on www.suggestafix.com:

... usnsvc.exe is still showing as a running process... If you set it to "disabled" without stopping the service, it's possible that it will not show on the next reboot. If you set it to "manual", it's possible that it has been reloaded from your startup items... I am not familiar with this new version of MSN Messenger, so I don't know if it can be disabled under MSN preferences or options. As I said before, it's not a baddie by itself but it is not needed (and "eats" about 2 Mb of your RAM memory).

"Messenger Sharing USN Journal Reader Service" program file info:

Directory: C:\Program Files\MSN Messenger\
File name: usnsvc.exe
Description: Messenger Sharing USN Journal Reader Service
Size: 225,353 bytes
Date: Tuesday, September 07, 2004, 5:12:32 PM
Version: 8.1.0168.00_ClientV8.1
Company name : Microsoft Corporation