Microsoft KB Archive/114358

= Insufficient Disk Space to Install MS-DOS 6.21 Upgrade =

Article ID: 114358

Article Last Modified on 12/2/1999

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APPLIES TO


 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q114358



SYMPTOMS
You run out of disk space when installing MS-DOS 6.21 over MS-DOS 6.0 or later or IBM PC DOS version 6.3.



CAUSE
When you install MS-DOS 6.21 on a system that has an existing copy of Microsoft Backup for MS-DOS or Microsoft Backup for Windows, you may get past the 4,200,000-byte minimum disk space check and subsequently run out of disk space during Setup. On a system with MS-DOS 6.0 or 6.2 installed with Backup for MS-DOS and/or Backup for Windows, the actual minimum free space required is 5,084,736 bytes.



WORKAROUND
To work around this problem, use the following steps when you receive the above error message:


 * 1) Exit Setup.
 * 2) Rename or delete MSBACKUP.EXE and MWBACKUP.EXE.
 * 3) Restart Setup.

This allows you to choose None for Backup and reduce the required free space to install MS-DOS.

Additional query words: 6.22 6.20 pcdos 6.3

Keywords: KB114358

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