Nothing in your post tells that the machine can play DVD. For software playback to occur, you need a certain power CPU, RAM and a properly installed OS.
Some don't know Microsoft doesn't install motherboard, usb, video and more drivers.
recently i kind of lagg when i try to see any dvds from my dvd player. windows media player / VLC media player / real player / intervideo wind dvd. all of these mention aboved, i have tried viewing the videos but the video images pauses for a split second at regular intervals. i have an external dvd writer and also an internal dvd + cd writer disc drive.. i tried on both but the same thing occurs.. i also tried reinstallin all the codecs but still same problem..