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:WinntSystem32config.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:WindowsSystem32Autoexec.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.

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