OK so i bought a computer a few months ago with windows 7 but decided i wanted ubuntu instead. So after a while of using ubuntu i want to install windows 7 back to the hard drive but in the installation menu it says that the hard drive is in the wrong format. I understand what this means but i need help formatting the drive to FAT32. The only other computer i have in the house is a laptop therefore i cant stick the computers hard drive inside of it.I've tried to boot ubuntu from a usb drive but it says i do not have permission to access the main drive. Does anyone know how i could possibly format the hard drive?