Using UNINSTAL.EXE With MS-DOS Upgrade (81739)

The information in this article applies to:
    Microsoft MS-DOS operating system 5.0
    Microsoft MS-DOS operating system 5.0a
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q81739


The UNINSTAL.EXE program included with your MS-DOS Upgrade should only be run under the version of MS-DOS that it shipped with. This is because the program assumes it will be run under that version, and other versions of MS-DOS may not be able to properly access the hard drive(s) or behave as UNINSTAL.EXE expects.


The Uninstall #1 disk must be created in drive A because it is an MS-DOS boot disk that automatically executes UNINSTAL.EXE. To uninstall MS-DOS, place the Uninstall #1 disk in drive A and reboot the computer.

If the Uninstall #1 disk won't boot, do the following:

    Create an MS-DOS system disk with the SETUP /F command.
    Rename the CONFIG.SYS file on that disk.
    Boot with that disk and then run the Uninstall program.
If you cannot run the SETUP /F command and another MS-DOS machine is available and is running the same version of MS-DOS, you can use the SYS command to create a system disk on that machine.

If you cannot create an MS-DOS system disk, determine whether the previous MS-DOS version can access the hard drive properly. If it does, you may be able to manually install the previous MS-DOS version without losing any data.

If necessary, reformat your disk using the previous MS-DOS version.

Modification Type: Major Last Reviewed: 5/12/2003
Keywords: KB81739