Windows 3.0 with Multimedia Extensions 1.0

Windows 3.0 with Multimedia Extensions 1.0 (also called "Multimedia Windows" by some sources) is a special, multimedia-centric OEM-only release of Windows 3.0, released on 20 October 1991 by various OEMs. Currently available releases include Tandy for the PC in English and German, an English release for the PC by Creative Labs, and a Japanese release for NEC PC-98.

It is the first version of Windows to support sound output and includes new programs for audio and video playback, including the first version of Media Player, new drivers for CD-ROM drives, sound cards, displays and joysticks and screensavers. The multimedia improvements were later incorporated into Windows 3.1. Though it still supports running in Real Mode, the new functionality is only available in Standard and 386 Enhanced modes.

Information from computer magazines
Another possible OEM release is shown and described in November 1991 issue of Serbian computer magazine "Svet Kompjutera" ("World of computers"). The boot screen shown in the magazine is different from the one in Tandy's release - it says, "Windows Version 3.0 + Multimedia Extensions 1.0", whereas Tandy's release says "Windows graphical environment with Multimedia Extensions 1.0". Oddly, Tandy release uses both of these names during installation.

The version shown in the magazine could be from a different OEM or even a beta (see below), though the latter seems less likely. The magazine also calls it "Multimedia Development Kit" (MDK).

Information from antitrust documents
An internal Microsoft document details the initial development plan for "Multimedia Windows". According to the document, the alpha release was shipped to 35 external testing groups on 15 June 1990, with 25-30 additional sites to receive it on 1 August 1990. The beta release was to be released in mid-October 1990 and the final OEM Adaptation Kit (OAK) in December 1990.

Tandy is mentioned as the first OEM to launch their multimedia-capable PC-compatibles with Multimedia Windows. IBM, Fujitsu, Sharp, Olivetti, Zenith, Sony and Intel are listed as potential candidates for release. Microsoft Works for Windows with Multimedia extensions is mentioned as one of the apps to tie in with new features of Multimedia Windows.

Windows Help
Windows Help in this release is version 3.07. The About dialog also states "Version 3.1.061d", which suggests this release has some files from pre-release versions of Windows 3.1 and would imply Tandy would've released it shortly after build 061d was compiled.

Control Panel
About dialog says "Control Panel for Windows graphical environment with Multimedia Extensions 1.0" and "Version 1.0".

Auto Install
A Tandy OEM application for installing other applications from removable media. Version 1.0.

Welcome
A fullscreen, run-once Tandy OEM application that says, "Tandy presents the world of multimedia".

Multimedia Main Menu
A Tandy OEM application for easy access to various multimedia demos, applications, and the Program Manager.

Reset Tandy Demo
A Tandy OEM application which resets the default shell back to FindCD.

FindCD
A Tandy OEM application that offers a tutorial and sound test. When finished, it first starts the Welcome application and then the Multimedia Main Menu.

Display drivers
Certain newer graphics cards (like S3 ViRGE or Paradise) may not work as it could lead to display corruption upon loading the graphical interface.

Startup fix
Tandy has changed the default shell in their release to their application called FindCD (see above). This requires you to insert the installation CD, but the application often hangs at the start (possibly due to bad soundcard configuration) and you won't be able to get into Windows itself without changing the shell back to Program Manager in.

To do this you must open the file  in the installation directory, find the   section and change the line   to  . Windows will now start Program Manager on startup.

This doesn't apply to the non-Tandy versions since they set the shell to  by default.

Virtual PC Enhanced Mode fix
As this release is based on Windows 3.00a, it also requires a change to  if you wish to run it in 386 Enhanced Mode in Virtual PC 2004/2007.

Other
Both Tandy and non-Tandy versions include special video drivers, including a | 320x200x256 color driver, with special fonts, it works on any virtualization software that emulates a VGA card.

File differences
The following files have been introduced or removed compared to Windows 3.00 MDK Version 59: