What does Boxing Day have to do with boxing?
1981, from re- + boot (v.) in the computer sense. Related: Rebooted; rebooting.
A term that comes from computer usage. To reboot a computer is to start it up again after a computer crash. Hence, “reboot” has the connotation of starting a process over again.
operating system (From boot) A boot with the implication that the computer has not been down for long, or that the boot is a bounce intended to clear some state of wedgitude. See warm boot. (1995-11-27)