Problems Installing MS-DOS 6.21 Upgrade over Novell DOS 7 (114359)

The information in this article applies to:
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q114359


If you attempt to upgrade from Novell DOS 7 to MS-DOS 6.21 and you have compressed your C drive, you receive the following error message

There is not enough free space on drive C to install MS-DOS. You cannot install MS-DOS unless your computer has at least 4,200,000 bytes of free disk space on drive C. Exit Setup, and move or delete unneeded files from the drive. For more information about freeing disk space, see 'Diagnosing and Solving Problems.'


MS-DOS 6.21 Setup was not tested with Novell DOS 7 and is not designed to be installed over Novell DOS 7. If you have Novell DOS 7 installed and your C drive is compressed, you cannot run MS-DOS 6.21 Setup.


To work around this problem, uninstall your Novell DOS 7 compression and then install MS-DOS 6.21.

Modification Type: Major Last Reviewed: 11/21/1999
Keywords: KB114359