Uninstalling Ubuntu from a Netbook [closed]

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http://askubuntu.com – I recently bought a netbook off a friend. It's a Dell Inspiron Mini and originally ran Windows 7. However at some point he installed Ubuntu on it and I do not have the tech savy to use it properly. I want to uninstall this and put Windows back on, however as it is a newbook there is no CD drive to use. What do I do? Please keep in mind that -This is not a Dual-boot, the is only Ubuntu on here. -There is no CD drive. (HowTos)