I remember that -- it was shipped back in the Windows 2.x days. This is when most people ran Dos, and Windows was an app that ran on top of Dos. I remember it coming with Pagemaker for one thing -- it installed very similar to regular windows, but you didn't get any type of shell or other desktop apps -- just a command to launch the target app under it.

This is one thing I would like to see developed again, but in reverse -- a Linux runtime for Windows. There was already a Linux kernel that would run as a user process under Windows (colinux, I think it was); combine this with an X frontend, and file system sharing, and you would be able to package up any Linux app for Windows.