When I turn it back on it goes back to the same screen that says "getting windows ready, do not turn off computer"
This means that Windows is programmed to go into hibernation when the power button is pressed. It did not really shut down. You can get it out of this mode by first getting into the BIOS setup mode, then shutting it off from there. Getting into the BIOS setup mode is machine-specific. You need to tap a certain key very rapidly at boot time, e.g. Esc, F1, F2, F12 or Del.
Some machines with an inbuilt battery have a small hole on the underside. Sticking a straightened paper clip into the hole will reset the machine.