Microsoft MS-DOS Upgrade Minimum Installation (75033)
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 Q75033
If you do not have enough free space to install Microsoft MS-DOS 5 or later
Upgrade even after removing unnecessary files, you can perform a minimal
installation. A minimal installation does NOT do the following:
• Expand and copy nonsystem files directly from the upgrade disks to
your hard disk.
• Copy your previous nonsystem files to the OLD_DOS directory.
A minimal installation creates the following:
• CONFIG.NEW and AUTOEXEC.NEW files
• MS-DOS version 5.0 or later system files (IO.SYS, MSDOS.SYS,
COMMAND.COM) on the hard drive
• An OLD_DOS directory containing only a README.NOW file
To perform a minimal installation, do the following:
• Create a set of working disks.
For more information about how to create working disks, see the
section titled "Installation on Floppy Disks" in Chapter 2 of the
version 5.0 "Microsoft MS-DOS Getting Started" manual.
• After you create the working disks, back up all of your current
MS-DOS files by copying them to another directory or disk.
• Remove any memory resident programs from your AUTOEXEC.BAT file.
• Insert Disk 1 - Setup in drive A.
• Type a:setup /m.
• When Setup is finished, press ENTER to restart your computer.
• Because you have the working disks of MS-DOS 5.0, you can
selectively copy nonsystem files of MS-DOS 5.0 to the previous
MS-DOS directory. Do not mix the previous MS-DOS nonsystem files with
the new ones in the same directory. An "Incorrect DOS Version" error
message will be displayed if the previous MS-DOS nonsystem file is
• Compare CONFIG.SYS and AUTOEXEC.BAT with CONFIG.NEW and
AUTOEXEC.NEW. Make necessary modifications.
• Restart the computer. Make sure there is no disk in the floppy
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