I am trying to get a better understanding of how BIOS and operating systems work. From what I understand, BIOS is a basic piece of software that is the first thing to be run when a computer turns on and loads the operating system. I also understand that the BIOS is written by the company that makes the computer. For example, Dell writes the BIOS for Dell computers. Please correct me if any of this is wrong.
I have been told that computers that get Windows 8 OS installed can no longer access the BIOS when the computer turns on. How does this work? It seems that the only way this would work is if the BIOS was dependent on the OS, but that doesn't really make sense.