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