But I can't, I'm stuck using Zorin OS 16 the pc I'm using is (HP-Compaq-Pro-3600-SFF). Like I can't uninstall it, I can't change password, I can't do anything. I don't know how to use or get ubuntu, I know how to use GRUB but I just don't know any commands to factory reset the computer back to windows. And my GRUB menu says (GNU GRUB 2.04). What do I do from there