Joe wants to know why he can't modify a Chromebook to download other software to it. Leo says he can modify a Chromebook and put Linux or Windows on it, but he'll lose a ton of security.
Joe will have to disable the Secure Boot feature. Then he can put a Linux shell called Crouton on it. Leo's done it before. He may also have to modify the firmware by putting it in Developer Mode. But he may not be able to boot it up. If that happens, he can always Powerwash it to get back to where he started.