Microsoft KB Archive/121857

= MS-DOS Setup Displays Error: Setup Error Detected =

Article ID: 121857

Article Last Modified on 11/26/1999

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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

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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:

SETUP ERROR DETECTED

The following disk error was detected. The listed file was not copied.

Error reading --> COMMAND.DAT

To exit Setup, press ENTER.



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

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