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What is usnsvc.exe?

Part of Messenger by Microsoft

What is it?

Messenger Sharing USN Journal Reader Service for Windows Messenger is a client by Microsoft that is included in Windows. It has a variety of features, such as instant messaging, presence awareness, support for Session Initiation Protocol (SIP), file transfer, application sharing and whiteboarding. The software integrates with Microsoft Exchange, Microsoft Outlook, Outlook Express, and the Remote Assistance feature of Windows XP.
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How does usnsvc.exe run?

Service - usnsvc.exe runs as a background Windows service (usnjsvc). This service runs as the SYSTEM account with extensive privileges on the local computer, and acts as the computer on the network.


What is the community is seeing?What is the community is doing?
About 0.5% of all Boost users have the usnsvc.exe process running.Of the 0.5% of usnsvc.exe users, 11.1% have disabled it.
How resource intensive is usnsvc.exe?
Comparison based on the average resource utilization across all programs.
0.00001% CPU112.1%
Average CPU utilization across all programs is 0.00001%.
     1.85 MB RAM8.6%
Average private memory utilization across all programs is 21.53 MB.
 2 /min0.1%
Average I/O read and write operations for all programs is 2,253 per minute.
Typical file (disk image) location:
C:\Program Files\msn messenger\usnsvc.exe

Are there other versions of Messenger?

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.196608)
Windows Vista Ultimate (6.0.6000.0)
Windows Vista (TM) Home Premium (6.0.6002.131072)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: usnsvc.exe
Publisher: Microsoft Corporation (verified)
Name: Messenger
Description: Messenger Sharing USN Journal Reader Service
Version: 8.5.1302.1018
Product version: 8.5.1302
Size: 96.02 KB
Original file name: usnsvc.exe

Digital certificate

Certificate authority: Microsoft Corporation
Effective date: 4/4/2006
Expiration date: 10/4/2007

Resource utilization

CPU utilization averages
Total CPU: 0.0000187822%
Privileged CPU: 0.0000075697%
User CPU: 0.00001121253339%
Total CPU time: 218 ms
Total CPU time /min: 0 ms
Privileged CPU time: 109.2 ms
Privileged CPU time /min: 0 ms
User CPU time: 124.8 ms
User CPU time /min: 0 ms
CPU cycle count: 127,603,377
CPU cycle count /min: 172,142
Memory utilization averages
Committed memory: 37 MB
Peak committed memory: 38.58 MB
Paged memory: 1.85 MB
Peak paged memory: 1.93 MB
Paged system memory: 72.52 KB
Non-paged system memory: 2.52 KB
Working set memory: 1.9 MB
Peak working set memory: 4.14 MB
Min working set memory: 1.82 MB
Private memory: 1.85 MB
Page faults: 3,242
Page faults /min: 6
Process I/O averages
Total read operations: 30
Read operations /min: 1
Total read transfer: 1.72 KB
Read transfer /min: 0 Bytes
Total write operations: 30
Write operations /min: 1
Total write transfer: 826 Bytes
Write transfer /min: 0 Bytes
Total other operations: 1,031
Other operations /min: 1
Total other transfer: 80.8 KB
Other Transfer /min: 9 Bytes
Handle count average: 119
Thread count average: 3
Thread resource averages

Process details

Runs as (owner): System
Integrety level: System
Windows platform: 32-bit
Runs as a service: Yes
Parent Processes
Process Command
"C:\Program Files\Windows Live\Messenger\usnsvc.exe"

Service details

Name: usnjsvc

Image hashes

MD5: 9d19b042a4fd5c02195071ea2fe0c821
SHA-1: ad3f221fd646f90c49023379e30f511f7ee568c9
SHA-256: 94825411f84801fda598e59a38fa5398d1e640aa3d704f026234feaebe9898bb

PE image details

File entropy: 6.51805
File packed: No
Import Table
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