Terminal Server users experience degradation in performance when they run 16-bit programs

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Article ID: 840214 - View products that this article applies to.
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Your users may experience degradation in performance when they run 16-bit programs in a Terminal Server session on a Microsoft Windows 2000-based server. Additionally, any temporary files that are created by the 16-bit programs will be stored in the %systemroot%\temp folder and not in your user temp folders.


This problem occurs whenever a 16-bit program creates a Microsoft Windows NT Virtual DOS Machine (NTVDM) session to run in. The NTVDM session uses the incorrect TEMP environment variable for all temporary files created by 16-bit programs.


Hotfix information

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.


No prerequisites are required.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this has the file attributes (or later) 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.
   Date         Time   Version            Size    File name
   19-Jun-2003  20:05         92,032  Krnl386.exe
   19-Jun-2003  20:05                     33,824  Ntio.sys
   19-Jun-2003  20:05                     34,544  Ntio404.sys
   19-Jun-2003  20:05                     35,648  Ntio411.sys
   19-Jun-2003  20:05                     35,408  Ntio412.sys
   19-Jun-2003  20:05                     34,544  Ntio804.sys
   05-Apr-2004  21:06  5.0.2195.6920     398,096  Ntvdm.exe        
   07-Apr-2004  16:38  5.0.2195.6920     240,912  Wow32.dll        


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
824684 Description of the standard terminology that is used to describe Microsoft software updates


Article ID: 840214 - Last Review: October 26, 2013 - Revision: 2.5
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Advanced Server
kbnosurvey kbarchive kbautohotfix kbqfe kbhotfixserver kbbug kbfix kbwin2000presp5fix KB840214

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