This can be of help. when you log on to a PC and receive the following error messages
"16-bit MS-DOS Subsystem
path to the program you are trying to run
C:\WINNT\system32\config.nt or autoexec.nt or command.com. The system file is not suitable for running MS-DOS and Microsoft Windows applications"
The resolution is shown below:
To resolve this issue, type the following commands at a command prompt to expand the Autoexec.nt, Command.com, and Config.nt files from the Windows 2000 or Windows Server 2003 installation CD-ROM to the Windows\System32 or Winnt\System32 folder. Press ENTER after you type each command. When you type these commands, replace cd-rom with the letter for your CD-ROM drive, drive_letter with the drive letter for your system partition, and system_root with the name of your Windows 2000 or Windows Server 2003 folder (this is typically either Winnt or Windows). After you type these commands, restart your computer:
Expand d:\i386\config.nt_ c:\winnt\system32\config.nt
expand d:\i386\autoexec.nt_ c:\winnt\system32\autoexec.nt
expand d:\i386\command.co_ c:\winnt \system32\command.com
1. d:\ is your CD-ROM drive letter (Change as necessary)
2. If c:\winnt\system32\config.nt does not work, try c:\winnt\system32\config, autoexec, command, etc.