thank youfor having answered. The problem is that when i insert a dvd cd ( 4,7 GB) in the drive to play it , the cd is not read and the title of its content does not show , also when to burn a dvd cd , the drive automatically open the tray and a msg appears asking me to insert an empty " unwritten " THOUGH IT IS UNWRITTEN . this problem does not happen when the cd is one of 760 mb. By the way, the driver of the drive is already updated . THANK YOU SO MUCH.