uninstalling Ubuntu Partition

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http://askubuntu.com – I want to uninstall Ubuntu that I have partitioned on my hard drive? I want it uninstalled so that I can install the new version for Windows that allows for Dual Booting(alongside Windows)How do I get to the area where I can access Ubuntu that was partitioned? I want to get to in so I can uninstall it, before I install Ubuntu for Windows. I tried creating an ISO image of Ubuntu on my USB drive, but I couldn't access the Welcome page of the program so I could get to the Allocate drive space portion, but it never showed up. Is that the way to go about it? (HowTos)