Apart from the Windows OS, you can also backup other files to DVD. After installing the Windows program, if you do not remove your copy of the ISO file, it will be counted as your backup copy. Under the Windows license rules, you can create a copy of the program as a backup copy that you can reinstall on the licensed computer. The licensing terms included in the program apply to your use of the software once you have installed it and agreed to the terms. You can create a single copy of the ISO file and save it on a disc, USB flash drive, or other storage drives to install the software.