·         Turn on the Power button.

·         CPU pins are reset and registers are set to specific value.

·         CPU jump to address of BIOS (0xFFFF0).

·         BIOS run POST (Power-On Self Test) and other necessary checks.

·         BIOS jumps to MBR(Master Boot Record).

·         Primary Bootloader runs from MBR and jumps to Secondary Bootloader.

·         Secondary Bootloaders loads Operating System.