Knowledge Base

Terminal Server Client Error: Not a Valid Windows NT Application

Article ID: 186605

Article Last Modified on 11/1/2006

Microsoft Windows NT Server 4.0, Terminal Server Edition

This article was previously published under Q186605

SYMPTOMS

A non-administrator user tries to launch an applications and receives the following error:

   <application> is not a valid Windows NT application.

The error may also occur if the system tried to start an application (such as Systray.exe on startup). Also, the system may not be able to determine what application is failing. In this case, the error message will appear but the <application> area may be blank.

CAUSE

The most likely cause is that the administrator has turned on the administrator utility Application Security, but has not added the failing application to the list of allowed applications.

RESOLUTION

At the Terminal Server, the administrator can add the failing application to the list of authorized applications. To do this,

Run the Application Security application and click ADD.
Browse for the application or enter the path. If the error message does not list the application, the administrator may need to run file auditing to determine what is failing.

Keywords: kbprb KB186605