The system file is not suitable for running MS-DOS and Micro

[stephen]

http://support.microsoft.com/kb/324767
The above web site tells how to recover config.nt autoexec.nt and command.com in the c:\windows\system32 folder of Windows XP.


SYMPTOMS
If you try to start or install an MS-DOS-based or a 16-bit Windows-based program on your Windows XP-based computer, you may receive an error message that is similar to one of the following:
16-bit MS-DOS Subsystem
path to the program that you are trying to start or install
C:\Winnt\System32\config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
16-bit MS-DOS Subsystem
path to the program that you are trying to start or install
config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
16-bit MS-DOS Subsystem
path to the program that you are trying to start or install
C:\Windows\System32\Autoexec.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
Although you may be prompted to quit the program or ignore the error message, either selection makes the program quit.

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CAUSE
This issue may occur if one or more of the following files are missing or damaged:
• Config.nt
• Autoexec.nt
• Command.com