im very sure it's my drive because whenever i insert a cd or dvd..it will make my computer lag. I'm using a samsung super writemaster, 300gb HDD, intel core 2 duo 2.13ghz, 7600GT, MSI p965 neo motherboard. so i dun think it's my pc problem. whenever i install games or play movies, it just lag badly. but wen i play songs using winamp is smooth but wen i play it using window media player, it juz create lag..