Cancelling the Installation
Once the installer finishes transferring files, the application is installed; you cannot cancel installation. Short of killing the installer process, you cannot cancel database initialization or component installation and seeding. The installer considers this portion of its work system configuration and not application installation so it cannot stop unless you kill the process. If you do manage to abort the install after file transfer completes (after the “creating uninstaller” message goes away), then you must run the uninstaller to remove the software.
Cancellation is not recommended. You may strand processes that you must then manually shut down. Some directories and files would be left behind after the automatic rollback that occurs when cancelling an install.