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You cannot send a CTRL+ALT+DELETE command to a remote computer that is running Windows XP or Windows 7 in a Remote Assistance session

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

You cannot use the CTRL+ALT+DELETE command to unlock a computer that you are connected to through a Remote Assistance session. This functionality is intended to increase security and to prevent computers from being unlocked remotely after a Remote Assistance session has been established.
This behavior is by design. A Remote Assistance session requires that the recipient of the session be present to accept the request. If the computer is locked or logged off, you cannot connect to that computer through a Remote Assistance session.

However, you can lock a computer while you are connected to it through a Remote Assistance session. For example, if the user walks away after a Remote Assistance session has been established, you can lock the remote computer by running the following command:

rundll32.exe user32.dll,LockWorkStation


Article ID: 2275037 - Last Review: 08/02/2010 10:41:00 - Revision: 1.1

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • KB2275037