Refers to restarting a
computer that is already turned on via the
operating system. Restarting it returns the computer to its initial state. A warm boot is sometimes necessary when a program encounters an error from which it cannot recover. On
PCs, you can perform a warm boot by pressing the
Control, Alt, and
Delete keys simultaneously. On
Macs, you can perform a warm boot by pressing the Restart button.
Also called a soft boot.
Contrast with cold boot, turning a computer on from an off position.