dvd burner on my laptop will read all the dvds i have burnt and movies i have bought but it will not read rental dvds all the time i have cleaned it several times and uninstalled and reinstalled most recent drivers. when i put a rental dvd in it acts like it is trying to read it then it starts making a skipping noise and stops and player acts as if there is no dvd in it. i am starting to think there is a new copy protection keeping burners from reading rental dvds or my drive is toast any ideas would be greatly appreciated.