This tool allows you to create a copy of the ISO file to a USB flash drive or a DVD. When you download the ISO file, you need to copy it to some medium in order to install Windows.
The ISO file contains all the Windows installation files combined into a single uncompressed file. Once this is done, you can install Windows 7 or Windows 8 directly from the USB flash drive or DVD. To create a bootable DVD or USB flash drive, download the ISO file and then run the Windows 7 USB/DVD Download tool. The Windows USB/DVD Download tool allows you to create a copy of your Windows 7/8 ISO file on a USB flash drive or a DVD.