But if we downloaded an ISO file to install it on a different PC or for a clean install we must have to create a bootable disk. In this case to install a Windows 10 operating system we require a bootable disk to start the installation process of Windows 10.Ī bootable disk is not required when we upgrade from older operating system like Windows 7 to Windows 10. Bootable disk is a disk which contains special files to boot up or startup the computer to start a utility or program.
Bootable disk is required when we need to do a fresh Windows installation.