My dell latitude D610 will not play dvds - Computers & Internet

First, and this is probably something you've already verified but I just want to ensure its covered, ensure that your drive is marked as a DVD drive and not just a CD drive. I see on the Dell hardware specs only a small percentage of the D610's came with CD-rom drives but I'd check that first.
Next, you need a program and a decoder for DVD video disks. If you don't have the original program provided by Dell (usually on a CD and usually called WinDVD for the time period that the D610's were sold prominently) I would download a program called VLC. It's a free program that plays a WIDE array of video files and can easy play dvd's (and provide the decoder as well!). It is available here: http://www.videolan.org/vlc/
Hope this helps!