very first installation of Linux kernel

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http://www.linuxforums.org – hi there, I am getting into Linux world (amazing!) but I need to understand some things like this: in a simplify scenario I have my computer and a BIOS in it(nothing else), so I turn it on.... then?? in a system which is already running I know it will find the boot loader and from there the kernel and then the OS (let's say an Ubuntu distribution) but how to install the kernel without installing any OS distribution, I see over there you guys talk about upload or update your kernel and even download it from kernel.org but how to start if I have my BIOS only?? Do I need to run a kernel from a C (HowTos)