A batch file in %SystemRoot%\System32 on machines running Microsoft Windows NT that is used to provide a startup environment when MS-DOS applications are run using the default.pif file.
You can configure autoexec.nt the same way you would configure autoexec.bat for running MS-DOS applications on Windows NT. The corresponding file config.nt performs the same function as config.sys. Once autoexec.nt and config.nt are configured, an MS-DOS application that is started in a new command window will use these files to configure the application’s environment. You can optionally create custom startup files for specific applications that cannot use your generic autoexec.nt and config.nt files.
Note: If you make any changes to autoexec.nt or config.nt, you must first log off and then log on again for the changes to take effect on the system.