CAUSE
When you install Microsoft Windows 3.1 SDK, the installation program
does not correctly handle the comments in the PROGMAN.INI file. As a
result, Microsoft Tools group is not available in Program Manager.
The Windows 3.1 SDK installation program uses an exiting group number
when the PROGMAN.INI file contains comments made by the MS-DOS 6
Upgrade Setup program.
For example, if you have the following [Groups] section in your
PROGMAN.INI file before you install Windows 3.1 SDK
Group1=C:\WINDOWS\MAIN.GRP
Group2=C:\WINDOWS\ACCESSOR.GRP
Group3=C:\WINDOWS\GAMES.GRP
;======== MS-DOS 6 Setup Modification - Begin ========
Group4=C:\DOS\WNTOOLS.GRP
;======== MS-DOS 6 Setup Modification - End ========
you have the following [Groups] section after you install the Windows
3.1 SDK:
Group1=C:\WINDOWS\MAIN.GRP
Group2=C:\WINDOWS\ACCESSOR.GRP
Group3=C:\WINDOWS\GAMES.GRP
Group4=C:\WINDEV\SDKTOOL1.GRP
Group4=C:\DOS\WNTOOLS.GRP
;======== MS-DOS 6 Setup Modification - End ========
As a result, the Microsoft Tools (WNTOOLS.GRP) is not available in
Program Manager.