If any of your programs stops responding and you can't shut it down except by rebooting use Process Killer

Recommended for "power users" only since it assumes that the user is knowledgeable and doesn't ask any questions. Use at your own risk.

Keep in mind that we will not be responsible for anything bad that happens to you for using this program. It is truly a "last resort" kind of utility. The program is very easy to use, just click the name of the process (program) in the list box on the left and then click the button with the skull & crossbones.