[ubuntu] usb install

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http://ubuntuforums.org – i made a bootable usb then tryed to install ubuntu , my goal is to fdisk windows and install ubntu . but i can only boot to usb , so i send away for a usb from ubuntu store . i cant even mount that . even though i am set to boot to usb when i do that windows says corrupt disk cant boot to usb . so put my usb in and am now using that to find a answer here . how can i get around asus embeded install of windows 7 ? i want to run ubuntu 12.10 and install it off of my store bought usb . can some one please help . (Hardware)