My laptop was working flawlessly, until yesterday when it froze up, the screen went dark, and it started whirring like an airplane taking off. Is this a normal occurance? What should I do about it? Please don't answer to press the off button, or pressing ctrl+q for quit. When it first stopped working, the keyboard would still work--you could still change the volume and if you pressed caps lock the light would still go on. Now after sounding like an airplane all night, even that doesn't work. Will i lose everything if i take out the battery?