For clarity in trouble shooting an understand of the terms is useful for a speedy fix.
This when the software displays an error message and closes unexpectedly.
This is when the software no longer responds to mouse or keyboard input but the operating system still responds normally.
This is when neither the operating system nor the applications respond to keyboard or mouse input.
This is when the whole operating system shuts down unexpectedly. Sometime with a blue screen message.
The software produced an effect your did not expect but in all other respects behaves as normal.