[ubuntu] I want to get rid of Windows

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http://ubuntuforums.org – I'm completely new to Ubuntu, but I love it so far. I currently have it installed on my laptop. I plan on buy an HDD for my desktop just to run Ubuntu. When I installed it (11.04) on my laptop, I chose to install it alongside Windows 7. Since I upgraded 11.04 to 11.10, I haven't been seeing an option to boot to windows, but that doesn't matter to me. What I want to do is completely get Windows off and just have Ubuntu on my laptop. How do I go about doing this? (Hardware)