Uninstall Wizard in launched:
Once Uninstall Wizard finishes scanning, it displays the final window to review and optionally unselect any of leftover item. Additionally one is able to export the data to XML.
When a file or folder is currently in use by the system, Uninstall Wizard schedules removal of such items on the next Windows reboot.
When some processes associated with the app to be uninstalled it still running, Uninstall Wizard offers to terminate them for correct removal of the app.
When Uninstall Wizard finishes its job you can view/save detailed removal log. Each operation (e.g. attempt to delete a file/folder/registry key or attempt to terminate a process/unregister COM object, etc) is recorded. When some operation fails, corresponding error code and explanation are put to the log.