Larry is trying to boot up Linux from his USB key. Leo says that you can go to xtraPC.com and get one for about $36. It's got Linux on a bootable USB. It won't work on every computer, but will on those models that enable USB booting. You just have to change the boot order in your BIOS settings to check the USB drive. But you can make your own. Go to System76.com/pop and download PopOS ISO file. They also have instructions on how to create your bootable USB.