MY ACER ASPIRE 5050 HAS THIS HORRIBLE GRINDING NOISE, IT POWERS UP BUT NOT TO THE WINDOWS JUST TO BLACK SCREEN WITH 'FATAL DISK ERROR, HARD DRIVE FAILURE" .... MY LAPTOP STARTED OUT WITH THIS OVERHEATING I GUESS AND IT FREEZES UP EVERY NOW AND THEN BUT THEN IT JUST WENT MENTAL ON ME ! CANT AFFORD TO LOSE IRREPLACEABLE PERSONAL STUFF ON COMPUTER WHAT DO I DO AND WHAT IS WRONG WITH IT ?!