RECEIVED THE LAPTOP FROM MY COURIER TODAY. OPENED IT, IT HAD A WRONG CABLE. I CHANGED IT TO A CORRECT ONE. THE LAPTOP FAILED TO START. DISCONNECTED THE CABLE AND TRIED TO START USING BATTERY.BUT AGAIN IT FAILED TO START. It again started again to. shown windows blue image then, the message ''REPAIRING DISK ERROR.THIS MIGHT TAKE OVER AN HOUR TO COMPLETE'This message goes on one endlessly on endless without stopping. what I should do?