I restart the Toshiba Satellite laptop. I don't even see the mouse cursor at all. Just totally unresponsive forcing me to reboot. Once in a blue moon, it'll load windows the 1st time but 8/10 times it'll just be completely black while the lights on the laptop are blinking. I can't even see the cursor, just completely black. Please help? I'm afraid all this forcing a reboot will damage the data stored on my HD. Thanks in advance.