In September 2006 Vivendi Universal released King's Quest Collection, a compilation CD for Windows XP encompassing games I-VII. Rather than porting the games directly, however, this release uses the original versions running under the DOSBox emulator and a Windows frontend. As a result, it is also possible to run King's Quest I-VI on other platforms with a little tweaking and ports of DOSBox. King's Quest VII is the earlier 16 bit windows version, version 1.4. It lacks dos compatibility, the improved save and restore functions, and character speed control found in version 2.0. It contains the dragon tail death that was removed from version 2.0, "Father always said to let sleeping dragons lie". It runs natively on Windows 32bit versions but is incompatible with 64bit windows.
Missing in the collection are the original AGI version of King's Quest 1, as well as the Windows CD version of King's Quest VI with high-resolution character art (some of the original Windows files were removed from this release), the 2.0 dos and windows versions of KQ VII, and King's Quest: Mask of Eternity. It also lacks any of the bonus material from previous collections.
This collection was released on Steam in July 2009.
Source: Wikipedia, "King's Quest", available under the CC-BY-SA License.