Windows 3.00 MDK Version 59

Windows 3.0 MDK Version 59 is a beta of Windows 3.0 Multimedia Edition. It was leaked by marcoguy on 19 December 2016 to BetaArchive. It is based on Windows 3.00a and installs new multimedia features, such as sound drivers and applications, screensavers, and the 320x200x256 resolution display drivers.

It is the earliest known build to include a startup sound (a creaking door, ), alongside a sound for system information and error dialogs. However, some sounds such as system shutdown have not yet been implemented. It also includes an early version of Media Player and Alarm Clock applications. When you exit MIDI Mapper in Control Panel, the Control Panel title now says "MIDI Mapper". Some application icons have been changed.

File differences
The following files have been introduced or removed compared to Windows 3.00a: