Purchased an LG Slim Portable DVD Writer (Model GP60NB50) for my lap top but it would not play DVDs. Emailed LG's customer service and received a response the next day. They suggested I download VLC Media Player (http://www.videolan.org) It worked! While it would have been helpful to have this information in the owner's manual, I have to give the customer service department kudos for their quick response and solving the problem satisfactorily.