Windows 95 Coexisting with OS/2 Warp
Last Updated: 9th September, 1995
The following information is derived directly from a text file used by IBM's
OS/2 Support that helps IBM's customers configure OS/2 Warp and Windows 95 so that
neither operating system conflicts with the other. Please read the
disclaimer below.
Please read entire document for full explanation of procedures.
When installing Windows95, there are steps you should take to make
the coexistence of Windows95 with OS/2 Warp smooth.
It's best not to install Windows95 over Windows 3.1.
During the Windows95 installation, select a directory other than
the Windows 3.1 directory if you want WIN-OS/2 support in the
OS/2 Warp for Windows version. The OS/2 Warp Fullpack versions of
WIN-OS/2 support are not affected by the Windows 95 installation.
Windows95 will copy over Windows 3.1 files and they are not
recoverable unless you have diskettes or make an archive during
the installation.
What if you installed Windows95 over Windows 3.1?
There's a simple solution for those with the OS/2 Warp for Windows
versions. If you have Windows 3.1 diskettes, you can install
Windows 3.1 to a separate subdirectory. Then Dual Boot or use
Boot Manager to start OS/2 and run Selective Install. Choose
to reinstall the WIN-OS/2 support and point to the new Windows
3.1 subdirectory.
What error occurs when you start WIN-OS/2 after installing Windows95
over Windows 3.1?
The error you get trying to start any WIN-OS/2 session which
points to Windows95 code is a SYS3175 dialog.
What error do I get if I try to start a Windows95 32-bit application
from WIN-OS/2?
If you migrate any Windows95 applets or applications to your
WIN-OS/2 environment, you get an Unexpected DOS Error: 23.
Click on OK to bypass the information message. You cannot run
32-bit Windows95 applications under OS/2 Warp or Windows 3.1.
How do I migrate 16-bit Windows applications that have been installed
from Windows95?
In order to ensure a stable application environment, Windows
applications should be reinstalled under OS/2 Warp to the same
directory they were installed to under Windows95 (to save space).
The Windows95 installation says Boot Manager will no longer be
usable. Is that true?
During the Windows95 installation, some "information messages"
appear if Dual Boot or Boot Manager are present on the system.
Always press continue to bypass these errors. There are no bad
effects from having OS/2 on the same partition as Windows95.
Boot Manager is no longer the ACTIVE partition, but can be made
active by following the steps below:
- Start FDISK from any prompt.
- Change the 1MB non-DOS partition (Boot Manager) to active.
- Save the settings.
- Shutdown and restart the system. You should now get the Boot
Manager menu.
How does Dual Boot work with Windows95?
If you start the Windows95 installation from DOS on a Dual Boot
system, there should not be any problems with Dual Boot between
Windows95 and OS/2. To start OS/2 do the following:
- Open a DOS prompt from Windows95.
- Type: C:\OS2\BOOT /OS2
- Answer Y to continue.
How do I get back to my original DOS setup once I've installed
Windows95?
To get back to the original DOS CONFIG.SYS system files, the
ones you started with before the Windows95 installation, do the
following:
- Shutdown Windows95 and restart it.
- During startup, as soon as you see "Starting Windows95..."
press F8 to get the Windows95 recovery screen.
- Select the last option on the list, Previous Version of
MS-DOS.
- You are now using the same DOS CONFIG.SYS that you started
with.
Disclaimer
IBM disclaims all warranties, whether express or implied, including
without limitation, warranties of fitness and merchantability with
respect to the information in this document. By furnishing this
document, IBM grants no licenses to any related patents or copyrights.
Copyright (c) 1994, 1995 IBM Corporation.
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information.