Reboot is a simple DOS program which will reboot your computer and is useful in batch files. The syntax is REBOOT WARM | COLD COLD causes the computer to reboot and perform a memory check. This is similar to pressing the reset button or turning the computer off and then on again. WARM reboots and bypasses the memory check. This is similar to pressing the CTRL+ALT+DEL key combination. You MUST use one of the two arguments (WARM or COLD).