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Error in Windows XP: 16-bit MS-DOS Subsystem

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Error opening DOS or 16-bit software programs

One of the following errors occur when attempting to open an MS-DOS or 16-bit software program:
16-bit Windows Subsystem - C:\WINDOWS\SYSTEM32\Config.nt. The system file is not suitable for running MS-DOS and Microsoft Windows applications.
or
16-bit Windows Subsystem - C:\WINDOWS\SYSTEM32\autoexec.net. The system file is not suitable for running MS-DOS and Microsoft Windows applications
This issue may occur if one or more of the following files are missing or damaged:
  • autoexec.nt
  • Config.nt

Resolving the error

Use the following steps to resolve this error:
NOTE:The following steps require administrative permissions (for read-only files) or the files will be removed after you restart Windows.
  1. Click Start , Run , and type the following in the Open field: c:\windows\repair .
    Figure 1: Run
    Image of Run window
  2. Click OK .
  3. Right-click Autoexec.nt and click Copy .
    Figure 2: C:\windows\repair
    Image of Explorer window
  4. Click Start , Run , and type the following in the Open field: c:\windows\system32 .
  5. Click OK .
    If the file is hidden click Show the contents of this file .
    Figure 3: These files are hidden
    Image of Explorer window with hidden files
  6. In the system 32 window, right-click autoexec.nt , select rename , and then rename the file to autoexect.bak .
  7. Right-click in a blank area in the system32 window and click Paste .
  8. Right-click the copied autoexec.nt file, in the system32 window, and click Properties .
    Figure 4: C:\windows\system32
    Image of Explorer window
  9. Select Read-Only , and click OK .
    Figure 5: AUTOEXEC.NT Properties
    Image of AUTOEXEC.NT Properties window
  10. Replace the Config.net file the same way.
  11. Restart the PC.
For more information refer to the Microsoft article: Error message when you install or start an MS-DOS or 16-bit Windows-based program (In English).
NOTE:One or more of the links above will take you outside the Hewlett-Packard Web site. HP does not control and is not responsible for information outside the HP Web site.

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