So you’ve discovered to your absolute horror that the WordPress site your company has inherited is running on Windows… on IIS? Before you stand up, throw your computer chair out the Window, maliciously eat your co-workers salad and enjoy it, or drop all the production databases, relax. We’ve got you covered. 😕 What’s the problem? Good point. IIS (Information Internet Services) is the home-grown proprietary (for now) web server provided by Microsoft for Windows customers.