People called the stuff on the surface "lava"
Scientists called the stuff the crust floats on "magma"
Science needed to draw a line for when magma becomes lava, they chose when it reaches the surface
Calling the stuff lining your underground lair lava is about as bad as calling the Moon a planet
Current Windows seems to need to reboot four times to get installed. Linux updates as it installs so it's just "reboot and eject installation media to start using your new system"