I'm scared to turn my computer off. The last time I did, it didn't want to start when I pressed the start button. Nothing happened. Finally, after pressing, and pressing, and punching with the tip of a pen, and pressing some more (and praying a whole lot), it 'clicked' and turned on. I just had it worked on about eight months ago. It would come on, but not start up. Now, of course, the warranty is out. Should I never turn it off? Is HP replacing the start buttons for free?