When I try to install the DOS based program in the WIndows XP I receive an error message as 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.. How to rectify this?

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

To resolve this issue, use the following method.

1. Click Start, click Run, type C:\windows\repair, and then click OK.
2. Right-click the Autoexec.nt file, and then click Copy.
3. Click Start, click Run, type %windir%\system32, and then click OK.
4. In the System32 folder, press Ctrl + V to paste the Autoexec.nt file in this folder.