Fellow reader Dado asked us, "How can I run multiple operating systems from a single USB?" This becomes practical if the different operating systems are Live CDs, i.e. designed to access a PC from outside of the computer's own operating system. This can be handy if the native operating system is corrupted through misuse, poor maintenance, or worse, malware. There are several tools that can help you create your multiboot USB stick. We tested three of them: XBoot, MultiBootUSB, and YUMI.