Hi Jeremy,
      
      In principal you could do something without live media by
      interrupting the boot by holding shift, overriding init= and then
      manually mounting filesystems/changing passwords, but this is far
      from something that a non tech-savvy person could do. Simply
      booting in single-user mode won't work because we don't set a root
      password by default, so systemd locks you out and you have to
      proceed with a normal graphical boot.
      
      It should be possible to guide someone through creating a USB
      stick (using the Endless USB creator for Windows for instance) and
      then booting it, opening a terminal and running "sudo
      eos-reset-password" but I appreciate the steps of creating and
      then booting from USB is still a bit of a pain.
      
      The script is installed in /usr/bin on Endless systems by default,
      so it should be on the path by default, or you can get it from our
      git repo at:
https://github.com/endlessm/eos-meta/blob/master/eos-tech-support/eos-reset-password
      (looking at this, we could probably be more robust at figuring out
      which is the internal disk with the OS installed on it...)
      
      Going back to your original message, what did you mean by
      universal reset? Erase the system back to a pristine state? You
      could just run the reflasher USB again to achieve this.
      
      Thanks,
      Rob