Abstract: A verification architecture for verifying that a setup application (or installer) for installing, modifying, repairing and uninstalling an application properly deploys the desired features in complex computing environments. The extensible framework allows all facets of an API to be customized for the needs of any software product. An explorer user interface facilitates viewing and managing the data that represents the behavior of the installer in the targeted environment. The explorer allows the user to make changes either on a single item or a large number of items all at once. The explorer can display the differences between two different executions of the tool, and then allow the user to view each individual difference and update the expected behavior in the environment based on the data presented. This solution applies to businesses that plan on releasing a software product which include multiple configurations and/or is intended to deploy on multiple platforms.