For the one who still has no idea about the BIOS on your PC, notice when you first turn on your PC or laptop a few screens pop up. It may be a logo such as DELL or HP or ASUS, Tyan , AWARD BIOS, AMI BIOS etc. You might also see a memory count. This is all part of the POST (Power on Self Test). POST is a test the BIOS runs before it hands over control to the OS (Operating System). You can see more of the post if you disable the logo choice in your BIOS. Otherwise just know that if you see a logo the POST is running.