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I just downloaded Ubuntu 12.10 on my laptop that came standard with Windows 7. I figured I'd give Ubuntu a try but now I'm finding that I prefer Windows. I was unaware that I could have Ubuntu as well as Windows before I downloaded it and I don't know how to revert back without a disc. Would a system restore work? I'm sorry for my lack of knowledge about this kind of thing but I would really like to revert back. Thank you.