Definition - What does Warm Reboot mean?
A warm reboot is the process of aborting and reloading the operating system when it’s already in an operational or live mode. This closes current programs including the operating system and reinitiates the boot sequence until the operating system and all startup programs are reloaded.
A warm reboot is also known as a soft boot, warm boot or warm restart.
Techopedia explains Warm Reboot
Warm reboot is primarily used in scenarios where it’s essential to restart the computer to restore its normal working operations, resolve program errors, or initiate changes in an installed application. Typically, a warm boot is performed by pressing the CTRL-ALT-DEL key simultaneously within Windows OS or selecting the restart function from the Start menu. In warm a reboot, the computer reloads faster than the time it would take to revive it from cold or dead state.