Three Method Click here to view : http://www.wikihow.com/Install-Windows-from-a-USB-Flash-Drive
If you're trying to install Windows on a laptop that doesn't have a DVD drive, or you want a portable installation tool that you can use on a lot of computers, creating a bootable USB Windows installation drive may be the answer you're looking for. All modern versions of Windows can be easily installed from a USB drive, as long as you have a valid Windows product key. You'll need a USB flash drive that has at least 4 GB of storage. For Windows 7 and Vista, you'll need an installation disc or an ISO image file of the installation disc as well.