Overview
You must create a LiveCD or LiveUSB disk before you being the installation. The installation process uses LiveCD or LiveUSB as the source image, formats the device on which the system is being installed, installs the system, and, if possible, preserves the configuration from previous installations. When the installation is completed, you reboot your system and the newly installed system begins running.
Note: Not all hardware supports the ability to boot from a USB device or compact Flash; check the BIOS of your hardware to see if it does.