Q: What IS Skywind exactly?
A: It is a non-commercial, fan made modification for The Elder Scrolls V: Skyrim that seeks to merge the amazing world of The Elder Scrolls III: Morrowind with the enhanced graphics and capabilities of Skyrim's engine.
While ownership of both games is required to play, the player only actually plays Skywind using the Skyrim game, and not the older Morrowind game. This means that the user interface, combat, graphics, and system requirements for the Skywind mod are all those of Skyrim, and NOT Morrowind.
Q: What do I need to run Skywind?
A: You will need a copy of TES III: Morrowind, including the Bloodmoon and Tribunal expansions installed correctly on your system. Plus TES V: Skyrim of course. The exact files that you will need to run, as well as the instructions you should follow to install can be located on The Official Installation Instruction Thread.