Default Username

Computers shouldn’t come with Microsoft keys preinstalled to begin with (or an operating system for that matter). Microsoft being able to have Windows preinstalled on the vast majority of non-Apple PCs is how they gained their monopoly in the first place.

This is especially true on computers where it is impossible to change the signing keys. Smartphones, game consoles, many laptops, some desktops, smart TVs, IoT devices, modern cars, etc.