You can rip a windows dvd, or if you have the iso image file you can open it with magic disc or daemon tools or even winrar, and you need to copy the whole content to a folder anywhere in your pc, you just need to make sure you know where it is located.

You just need to follow these simple steps: This method does not work if your operating sistem is windows xp or windows 8, you cannot select the primary partition in comand prompt. Creating a usb pendrive using command prompt is not hard, it is one of the most common ways to create a bootable usb.