When you have to install a version of Windows or Linux you
have to go to the installation CD. But if the computer does not have a Rufus CD
or DVD Drive, you can convert an ISO Image to a Bootable USB Flash Drive.
Even better is YUMI, which allows you to put multiple Live
CDs on one USB drive, which means you can combine all of your rescue disks,
Linux distros, and other tools and put them in your pocket.