Microsoft KB Archive/75837

= Using BACKUP/F After Installing the MS-DOS 5 Upgrade =

Article ID: 75837

Article Last Modified on 11/22/1999

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition

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This article was previously published under Q75837



SUMMARY
After installing the Microsoft MS-DOS 5 Upgrade, the BACKUP command can return the message &quot;Incorrect DOS version&quot; if you try to format a disk during the backup procedure using the /f[:size] parameter.



MORE INFORMATION
BACKUP can appear to work correctly for the first few disks, but when the BACKUP command tries to back up the OLD_DOS.X directory it attempts to use the older version of FORMAT.COM.

To correct the problem, remove or rename all old FORMAT.COM files from your computer OR delete the OLD_DOS.X directory using DELOLDOS.EXE.

To find all occurrences of FORMAT.COM, type the following from the root directory:

DIR/S FORMAT.COM

More information on the BACKUP command can be found in the &quot;Microsoft MS-DOS User's Guide&quot; on pages 370-373.

Additional query words: 5.00

Keywords: KB75837

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