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PsLoggedOn v1.34

By Mark Russinovich

Published: April 28, 2010

Download PsTools (1.6 MB)



You can determine who is using resources on your local computer with the "net" command ("net session"), however, there is no built-in way to determine who is using the resources of a remote computer. In addition, NT comes with no tools to see who is logged onto a computer, either locally or remotely. PsLoggedOn is an applet that displays both the locally logged on users and users logged on via resources for either the local computer, or a remote one. If you specify a user name instead of a computer, PsLoggedOn searches the computers in the network neighborhood and tells you if the user is currently logged on.

PsLoggedOn's definition of a locally logged on user is one that has their profile loaded into the Registry, so PsLoggedOn determines who is logged on by scanning the keys under the HKEY_USERS key. For each key that has a name that is a user SID (security Identifier), PsLoggedOn looks up the corresponding user name and displays it. To determine who is logged onto a computer via resource shares, PsLoggedOn uses the NetSessionEnum API. Note that PsLoggedOn will show you as logged on via resource share to remote computers that you query because a logon is required for PsLoggedOn to access the Registry of a remote system.



Just copy PsLoggedOn onto your executable path, and type "psloggedon".


Using PsLoggedOn

Usage: psloggedon [- ] [-l] [-x] [\\computername | username]

-Displays the supported options and the units of measurement used for output values.
-lShows only local logons instead of both local and network resource logons.
-xDon't show logon times.
\\computernameSpecifies the name of the computer for which to list logon information.
usernameIf you specify a user name PsLoggedOn searches the network for computers to which that user is logged on. This is useful if you want to ensure that a particular user is not logged on when you are about to change their user profile configuration.



Download PsTools
(1.6 MB)





Download PsTools
(1.6 MB)


PsLoggedOn is part of a growing kit of Sysinternals command-line tools that aid in the adminstration of local and remote systems named PsTools.

Runs on:

  • Client: Windows XP and higher.
  • Server: Windows Server 2003 and higher.