If you have the original Windows installation disc, you can use that instead of the ISO image. You have the ISO image of Windows XP, Vista, 7, 8 or 8.1.Your BIOS/UEFI is properly configured to boot from the USB flash drive first.The USB drive is empty and properly formatted.Before you start creating a bootable USB flash drive to install Windows (XP, Vista, 7, 8, 8.1, 10), you need to make sure that: