Guys do anyone now how to make an os, i know how to program it but still i don't understand some parts in it. How d i make one of my computer run on my own os. And can i juz program the full thing in windows or there is any other ways,??
Operating system development might very well be one of the hardest topics to tackle and should only be done when you're very comfortable with a language suited for system programming (eg. C) and an assembly language for the CPU you'll be developing for. You'll also need to have a decent understanding how computers work on a bare metal level, you'll have absolutely no helper libraries at your disposal, you'll literally have to do everything all by yourself.
I've done a few kernels myself, and it takes months to get something you could actually do something useful with, even with a solid background in programming and general computer knowledge.
You're the same person who wanted to write a game engine, right? I think you're setting your goals far too high for your current skill level, start with the basics: one must know how to walk before he can learn how to run