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.
To close a program that's frozen on Windows:
• Press Ctrl+Shift+Esc
to directly open the Task Manager.
• In the Applications tab, click on the program that's not responding (the status will say "Not Responding") and then click the End Task
• In the new dialog box that appears, click End Task
to close the application.
Mac OS X has both keyboard shortcuts for closing applications that aren't responding and menu options.
• To force quit an application with your mouse, click on its icon in the dock and just hold down the left mouse button until the "Force Quit"
option appears. Or, optionally, you can right-click and choose "Force Quit"
• To select from a list of applications to quit, click on the Apple icon in the menu bar, then "Force Quit"
• The keyboard shortcut to quit the application on top that isn't responding is Cmd+Opt+Shift+Esc
• The keyboard shortcut to get the Force Quit menu of all applications open is Cmd+Opt+Esc
Alan Henry's got a nice video showing these Force Quit shortcuts in action.
If a specific program keeps freezing on you, it's a sign that someting's wrong. Application freezes can be due to a number of issues, though, like software bugs or hardware driver issues, which makes troubleshooting a bit difficult.
Your best bet is to make sure your operating system is up to date, check if there are any updates for your software and hardware drivers, and make sure you have your anti-virus and anti-spyware running and up to date as well. These are all part of basic Windows maintenance and Mac maintenance essentials (we've got a Linux maintenance guide too). If you continue to have problems with one specific program freezing, check the vendor's support website for a solution.