Converting Ubuntu under Windows into only OS [closed]

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http://askubuntu.com – Possible Duplicate: How to convert Wubi install into regular install? I have installed Ubuntu 12.04 LTS under Windows with WUBI. Now my Windows XP started malfunctioning and I see this as the opportunity to leave windows and make Ubuntu as the only OS in my computer. I could download Ubuntu and make a fresh installation. However, I had some problem in java to make it work properly on Ubuntu, so I would prefer to use my current installation setup (HowTos)