When you try to run a program on a Microsoft Windows 2000-based computer, you may receive the following error message:
“config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose ‘Close’ to terminate the application.”
Just click on the below provided OS links that you have:
Download the zip files and unzip them on their default locations.
Now run the program or installation that was causing error and its done.