Article ID: 121857
Article Last Modified on 11/26/1999
APPLIES TO
- Microsoft MS-DOS 6.0 Standard Edition
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.21 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition
This article was previously published under Q121857
SYMPTOMS
When you are installing MS-DOS Upgrade or MS-DOS StepUp, the following error message is displayed:
CAUSE
The Uninstall process of Setup displays the above error message when it is trying to copy C:\COMMAND.COM to A:\COMMAND.DAT on the Uninstall disk.
This error occurs when COMMAND.COM is cross-linked with another file, has allocation unit errors, or there is a bad sector on the disk.
RESOLUTION
You can correct this problem by replacing the COMMAND.COM file. Copy the COMMAND.COM file from your DOS directory over the existing COMMAND.COM file in the root directory using the following commands:
attrib -r command.com
ren command.com command.old
copy c:\dos\command.com c:\command.com
NOTE: If the Uninstall portion of setup is bypassed by using the SETUP /G switch, the error does not occur. Also, using CHKDSK /F or SCANDISK may allow you to work around this problem.
Additional query words: 6.00 6.20 6.21 6.22 setup error err msg command.dat step-up
Keywords: KB121857
