Versions

8.5.1302.1018	63.64%
8.5.1288.0816	9.09%
8.1.0178.00	27.27%

There are 3 versions of usnsvc.exe in the wild, the latest version being 8.5.1302.1018. It is started as a Windows Service called 'usnjsvc' with the name 'SYSTEM\CurrentControlSet\Services\usnjsvc'. In addition, it is run under the context of the SYSTEM account with extensive privileges (the administrator accounts have the same privileges). The average file size is about 95.75 KB. The file is a digitally signed and issued to Microsoft Corporation by Microsoft Corporation. The programs Windows Live Messenger, Windows Live Essentials and OutlookAddInNet3Setup have been observed as installing specific variations of usnsvc.exe. During the process's lifecycle, the typical CPU resource utilization is about 0.0000% including both foreground and background operations, the average private memory consumption is about 1.85 MB with the maximum memory reaching around 3.77 MB. Addionally, typically read and write I/O disk operations is about 0 Bytes per minute for reads and 0 Bytes per minute for writes.

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.