It is necessary to force closing Windows applications in situations where an application does not respond, is frozen, or hinders the normal operation of the computer. The simplest approach is to open Task Manager by pressing Ctrl+Shift+Esc, choose the application that causes trouble, and click on End Task. Another possibility is to press Alt+F4 in order to close the current application window. Nonetheless, force-closing an application should not be your initial choice, as it might affect the background processes and delete any unsaved information. If your computer often freezes, you need to check available Windows updates, update application software, and analyze the computer's system resources in Task Manager.