Why it's like this that when I open an app (a built-in or a Windows Store downloaded), after using it and at last closing it from the upper-right close button (in Windows 8.1 Update 1), I still see that app shown in Windows Task Manager using my memory too...
To end it again, I need to do a right click>End Task or Click on that app>End Task button in lower-right panel of Task Manager.
Does it also uses background tasks? It can slow one's PC after all..