Do I Need Special Software To Play Blu-rays On My Laptop?

I just bought a Dell Studio XPS 16 laptop, and it came with an HD screen and a DVD optical drive. I am thinking about replacing the optical drive with a blu-ray drive. Now is that all I have to do in order to play blu-rays, or do I also need to buy special software? I have heard of the Corel WinDVD 9 Plus (Blu-ray). Do I need software like this to play blu-rays?

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