Nero Burning Rom may be the most used burning software for Windows but despite its high functionality it still is quite expensive. Luckily there are some free alternative burning softwares on the internet which can compete to Nero's performance, one of them being ImgBurn:
ImgBurn provides you with the crucial burning-processes you will need: writing files, data, and images to a disk. You can copy disks by making images of them or create those from files, making it possible to duplicate your Windows installation disk by copying its files and creating a bootable disk out of it.
Download ImgBurn from its homepage: http://www.imgburn.com/index.php?act=download