USB-boot is a process of using USB storage device or start an operating system.
USB-boot is used by enabling the computer hardware to use the USB storage device, which contains the booting information. It is similar to the floppy disk drive (FDD) with booting capability. Its main objective is to recover, repair and install an operating system. The above process can be done by the utility that fed the operating system files and boot sequence in the USB drive to enable the USB boot.