Windows Update shows then a pop-up which says: Do you want to uninstall this package "YES" or "NO"?Ensure you have not tick the option "Can request user inputs".
On Windows 8.1, it takes very long before the Java update 8 u 25 is finished with installing.Why are you talking of installing Java 8u25, your package is to uninstall Java Auto Updater, which is another product ?