How do I get my dell inspiron laptop to let me view my DVD with the program that I want?

I have a Dell inspiron 1525 laptop. I just bought season one of True Blood and I started watching it, but the program I use (Media Direct) makes the disc skip, when I know for a fact that it does not skip in a regular DVD player. I want to use Windows Media Player, but whenever I open the program and go to play the disc, Media Direct automatically opens up and plays the disc. I don’t want to erase the program or anything, I just want to be able to choose which program I use to play my DVD’s. Help?