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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
A user logs on to a Microsoft Windows 2000-based computer through a Terminal Services session, and then runs a 16-bit Windows program. After the user quits the 16-bit Windows program, the Ntvdm.exe process does not quit. Instead, the Ntvdm.exe process remains running. If the Override settings from the user profile and Client Connection manager wizard option is configured on the server, the Terminal Services session may stop responding (hang) when the user logs off. You experience these symptoms after you install a security update on the Windows 2000-based computer. This security update is documented in the following Microsoft Knowledge Base article:
840987 MS04-032: Security update for Microsoft Windows
This problem occurs because 16-bit processes run under a shared Ntvdm.exe process. The shared Windows-on-Windows (WOW) process does not unregister itself when the WOW process processes the quit message for the Windows 16-bit program.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
This hotfix requires Windows 2000 Service Pack 4 (SP4).
You must restart your computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To work around this problem, follow these steps on the server:
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate, and then click the following registry subkey: