Autoexec.nt - Windows 16 bit Subsystem

January 2017

It is very common to see an error message on your computer screen while installing a 16 bit version of Windows: "The autoexec.nt system file is not the correct option to run MS DOS & Windows applications". Like most problems, there is a solution for this. The safest way to troubleshoot the problem is to copy the 'autoexec.nt' file from the repair location and paste it to 'System32' address location, thereby making it a read-only one from the property of the file. The second solution is to extract the file 'autoexec.nt' from the Windows Installation CD, using the 'Expand' command to do the necessary things. Lastly, create a batch file using notepad with the file name 'autoexec.nt', copying it system32.

When trying to install a 16 bit Windows on your PC, the following error message appears on your screen:

c:\windows\system32\autoexec.NT. The system file is not suitable for running MS-DOS and Microsoft Windows applications " is displayed when installing Backup Exec for Windows Server 9.x

Below are some solutions of how to troubleshoot:

Solution 1

  • Make a search of the file autoexec.nt under C: \ windows \ repair and copy same in C: \ Windows \ system 32
  • View the properties of this file and check the read-only

Solution 2

  • You can extract the file autoexec.nt from the Windows XP CD installation
  • Run the CD from your drive and from MS-DOS prompt, type the command:

expand D:\i386\autoexec.nt_ c:\windows\system32\autoexec.nt   
  • View the properties of this file and check the read-only mode

Solution 3

  • Open a notepad and copy the following code:

@ echo off   
lh% SystemRoot% \ system32 \ mscdexnt.exe   
lh% SystemRoot% \ system32 \ redir   
lh% SystemRoot% \ system32 \ dosx 
  • Save this file as "autoexec.nt" (select the All Files)
  • Copy it in the folder C: \windows\system32
  • Show file properties and check the read-only mode


Published by deri58. Latest update on March 15, 2012 at 10:21 AM by Celia Gatward.
This document, titled "Autoexec.nt - Windows 16 bit Subsystem," is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (