ActiSetup 2006 descriptions ActiSetup is an advanced setup development environment for Microsoft Windows Installer. It supports authoring MSI installation packages merge modules & patches. It allows you to create installation packages for your software products with maximum ease of use & flexibility. With ActiSetup you can quickly create installations with a single step-by-step wizard as well as directly edit the MSI tables for greater fine-tuning. ActiSetup also includes an updater service so you can deliver patches to users of your application reliably & efficiently. Finally ActiSetup includes a setup bootstrapper designed to simplify the process of installing prerequisites such as the . NET Framework.