Microsoft KB Archive/104252

= Running MS-DOS 6.2 Step-Up over an OEM Version of MS-DOS 6.0 =

PSS ID Number: 104252

Article Last Modified on 11/18/1999

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The information in this article applies to:


 * Microsoft MS-DOS operating system 6.2
 * Microsoft MS-DOS operating system 6.22

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This article was previously published under Q104252



SUMMARY
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.



SYMPTOMS
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:

In order to run the MS-DOS 6.2 single-disk upgrade, you must already have MS-DOS 6.0 installed on your system.

-or-

Cannot Update File. Setup could not update the following file to MS-DOS 6.2:

Although Setup can continue without updating this file, your MS-DOS 6.2 installation will be incomplete.



CAUSE
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:
 * Compaq
 * Dell
 * Texas Instruments
 * Toshiba



Dell
MS-DOS 6.2 Step-Up installs successfully, but you lose OEM-added functionality with the following programs:

KEYB.COM

POWER.EXE

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:

COMMAND.COM

DOSSETUP.INI

FORMAT.COM

IO.SYS

PRINT.EXE

SETUP.OEM

SYS.COM

Toshiba
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:

IO.SYS

ANSI.SYS

DISPLAY.SYS

KEYBOARD.SYS

EGA.SYS

GRAPHICS.COM

GRAPHICS.PRO

KEYB.COM

MODE.COM

EGA.CPI

CGA.GRB

EGA.GRB

EGAMONO.GRB

MONO.GRB

VGA.GRB

VGAMONO.GRB

EMM386.EXE

FDISK.EXE

SMARTDRV.EXE

FORMAT.COM

Additional query words: 6.20 "incorrect msdos.sys or io.sys"

Keywords: KB104252

Technology: kbMSDOS620 kbMSDOS622 kbMSDOSSearch

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