I am in the process of trying to learn how to upgrade my dvd rw drive. I used the Nero Infotool and read that I have a 4.0 lite-on dvdrw sohw-1633 drive with firmware: BGS4 I got the latest upgrade from lite-on which was the BSOY I have been researching this for a few days and read that lite-on upgrades might create a problem with e-machines (do to stock parts or something along those lines). So I went to emachine's website and did a tech support chat were they controlled my computer and identified my drive as being a TS-H552B - manufactuered by Toshiba Samsung Storage Technology. Can this be right? I sometimes get the impression that some tech support agents don't really understand the questions and my computer management window says it is a lite-on drive. They supplied me with firmware flash upgrade but i wanted to run it by someone else for thoughts and comments.