Removal of windows without re installation of Linux?

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http://www.linuxquestions.org – (Background info, semi important) So I am a relatively inexperienced user of Linux. I have some experience and have dabbled in linux mint on several occasions, I get what linux is I suppose. I was running windows XP before, it caught a virus and I rigged up a usb drive to install another copy of XP over that because my disk drive is broken. I decided yesterday to make a switch to linux, I was fed up with windows and I can do anything windows can do with linux if I actually immerse myself in it with a little work and a little learning. (Actual problem) So I downloaded a copy of Ubuntu 10 (HowTos)