Two basic files in DOS, namely CONFIG.SYS and AUTOEXEC.BAT, are used to configure your system. But in WinNT, these files are called CONFIG.NT and AUTOEXEC.NT and are found in the directory
echoconfig: By default, no information is displayed when MS-DOS environment is initialized. To display information, add the command echoconfig in the config.nt/autoexec.nt files.
ntcmdprompt: When you return to the command prompt from a TSR or while running a MS-DOS application, WinNT runs command.com (see above) This allows the TSR to remain active. To run cmd.exe (the WinNT command prompt) rather than command.com, add the command ntcmdprompt in CONFIG.NT or other startup file.
dosonly: By default, you can start any application from command.com. But if you start an application other than MS-DOS application, any running TSR may be disrupted. To ensure that only MS-DOS applications can be started, add the command dosonly to config.nt or other startup file.