Question: what are the four main parts of the boot process?
Answer: The POST Process. Once your PC has been powered on, the BIOS begins its work as part of the POST (Power-On Self Test) process. ...  BIOS Boot Handoff. ...  The Partition Table. ...  Bootstrap Code. ...  Boot Signature. ...  The second-stage bootloader. ...  Boot Configuration Files. ...  Popular Bootloaders.