Microsoft KB Archive/104252
PSS ID Number: 104252
Article Last Modified on 11/18/1999
The information in this article applies to:
- Microsoft MS-DOS operating system 6.2
- Microsoft MS-DOS operating system 6.22
This article was previously published under Q104252
This information applies to both Microsoft DoubleSpace and Microsoft DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands and filenames.
When you try to install MS-DOS 6.2 Step-Up over an original equipment manufacturer (OEM) version of MS-DOS 6.0, you may receive one of the following error messages:
If you receive the first error message noted above, you either have the OEM "base version" of MS-DOS 6.0, or your OEM has modified the core MS-DOS 6.2 system files (IO.SYS, MSDOS.SYS, and COMMAND.COM). If your OEM version of MS-DOS 6.2 falls into either of these categories, you must either obtain your OEM's version of MS-DOS 6.2 or obtain the MS-DOS 6.2 Upgrade. If you choose to obtain the MS-DOS 6.2 Upgrade, you may lose some MS-DOS functionality or features added to MS-DOS 6.0 by your OEM.
NOTE: Step-Up cannot upgrade the OEM base version of MS-DOS 6.0 because the OEM base version does not include DoubleSpace, Microsoft Backup, Microsoft Anti-Virus, and Microsoft Undelete.
If you receive the second error message noted above, your OEM has modified one or more of the MS-DOS 6.2 files but has not modified the core system files. In this case, you can successfully install MS-DOS 6.2, but some files will not be updated. You may be able to work around this situation by copying the MS-DOS 6.0 OEM version of the files that were not updated from the C:\OLD_DOS.1 directory to the C:\DOS directory and then using SETVER.EXE to report MS-DOS as version 6.0 to the program files that were not updated. Before doing so, contact your OEM to determine if this would be a safe and practical workaround.
The following OEMs have modified MS-DOS 6.0 in some manner:
- Texas Instruments
MS-DOS 6.2 Step-Up installs successfully, but you lose OEM-added functionality with the following programs:
Texas Instruments (TI)
TI modified core MS-DOS system files. You must either obtain the OEM version of MS-DOS 6.2 or the MS-DOS 6.2 Upgrade. With the MS-DOS 6.2 Upgrade, you may lose functionality added by TI. Texas Instruments modified the following MS-DOS 6.0 files:
Toshiba has released the Toshiba Special Enhancements Package (TSEP)for MS-DOS 6.2. This release updates an installation of MS-DOS 6.2, adding Toshiba's special enhancements for complete compatibility with Toshiba's proprietary features. To use TSEP, your specific Toshiba model must be compatible with this release of TSEP and must already have MS-DOS 6.2 or the MS-DOS 6.2 Step-Up package installed on it.
To obtain TSEP, download TSEP62.EXE from the Toshiba bulletin board at (714) 837-4408. For more information, contact Toshiba Technical Support.
Toshiba replaces the following MS-DOS 6.2 files:
Additional query words: 6.20 "incorrect msdos.sys or io.sys"
Technology: kbMSDOS620 kbMSDOS622 kbMSDOSSearch