HowTo: Closing Not Responding Programs

How To Close A Program That Is Not Responding | Lifehacker Australia

Every computer user at some point will likely have to deal with a program that just stops responding. The application simply freezes or hangs. Here’s how to completely close the program with Windows’ Task Manager or Mac OS X’s Force Quit.  

Remember what it was like when applications never froze? Me neither. But new computer users who have never hit Ctrl+Alt+Del (or the more direct Ctrl+Shift+Esc shortcut) will definitely need to learn how to use End Task on Windows or Force Quit on the Mac; you could email these directions to them or print it out as a handy reference for the future.