Hi, I would like to know how to play DVDs on a emachines? I put the DVD in and nothing happens.

Is the drive actually a dvd drive and not just a cd drive? Are you using Windows XP?

Is this a data dvd or a movie?

If you are running XP, and have a dvd drive, you need software to play a dvd movie. I suggest downloading a free media player called VLC.
It can play dvd video for you.

Edit: I was too late.

In addition to the above posts, you may not have “autoplay” enabled (which is probably good).