There would be times when computer just stops while you are in the middle of your work. The first thing you do is determine if the entire system is not responding or it is just the particular application you are using. Try to press the Caps Lock button, then see if the Num Lock and /or Caps Lock led indicators (in the uppermost right corner of your keyboard)light up.If they do, then it is most likely that only application you are using is the one not responding (see 1a.). If you see no reaction at all,then the entire system is not working(see 1b.)

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