Once you have Morrowind installed you will need to decide whether you want to install the latest stable version of OpenMW, or the latest development build. The development build may be in the early stages of development and may have bugs. If you decide to use the development build, however, you can opt-in to several mods that take advantage of the latest features in development. You can find a list mods that require the development build here.

OpenMW Stable installer instructions:

• For Windows, download the installer for the latest stable release.
• Run the installer. It will have you choose the location where you would like to install OpenMW.
• Open the OpenMW Launcher located in the folder where you installed OpenMW.
• The first time you run the launcher it will start the Installation Wizard. If it doesn't, navigate to the Settings tab and run the Installation Wizard from there.
• The Installation Wizard will have you find your vanilla Morrowind Data Files folder. Also, make sure you import all settings from the Morrowind.ini file when the Wizard gives you the option. In other words, make sure all of the boxes are checked.

• Download the latest development build.
• Note: This requires the Visual C++ redistributable to be installed, and a link is provided underneath the development build download link.
• Extract the contents of the .zip archive to the location where you would like to install OpenMW.
• Open the OpenMW Launcher located in the folder you extracted above.
• The first time you run the launcher it will start the Installation Wizard. If it doesn't, navigate to the Settings tab and run the Installation Wizard from there.
• The Installation Wizard will have you find your vanilla Morrowind Data Files folder. Also, make sure you import all settings from the Morrowind.ini file when the Wizard gives you the option. In other words, make sure all of the boxes are checked.