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AUTOEXEC.NT, CONFIG.NT - The system file is not suitable for running MS-DOS and Microsoft Windows applications

Problem

You start to install Office 97 or run some other program for the first time and get the following message:

C:\Windows\System32\AUTOEXEC.NT.  
The system file is not suitable for running MS-DOS and Microsoft Windows applications.  
Choose 'Close' to terminate this application.

Solution

This Microsoft article describes the problem in detail

The quick version:

If you run into this or similar "WOW DVM" errors when running a 16-bit program (and the Office 97 installer is 16-bit, though the program itself is 32-bit) it's because one of the following files is missing from \Windows\System32:

Check to see that these files are there. If not, expand them from the Windows installation CD and copy them to \Windows\System32. They'll be in the \I386 folder as

Config.nt_
autoexec.nt_
command.co_

You'll need to use the Expand program to convert these to usable form. From a command prompt window, type

Expand /?

to get instructions for using Expand

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AUTOEXEC.NT, CONFIG.NT - The system file is not suitable for running MS-DOS and Microsoft Windows applications
http://www.pptfaq.com/FAQ00642_AUTOEXEC-NT-_CONFIG-NT_-_The_system_file_is_not_suitable_for_running_MS-DOS_and_Microsoft_Windows_applications.htm
Last update 07 June, 2011
Created: