Head to the boot selection and click on SELECT to locate your recently downloaded ISO image of Windows 7.ģ. We selected a 16 GB flash drive for the purpose, but an 8 GB would be enough for a single language Windows 7 setup.Ģ. Launch Rufus and then select the drive in which you want to create the bootable. Copy the files from your USB drive to avoid data lossġ.You can download its portable version to get started. We will use Rufus, a free application tool, to create Windows 7 bootable disk. When you have to install Windows 7 on a different or several PCs, it is important to create a bootable disc or drive.