CPU-
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I'm too lazy to hyper link it all.
That build is much better, and much more future proof. As said above, pirate windows, its real easy.
You will most likely not be able to transfer it from your laptop unless you bought the laptop without windows on it and installed it on afterwards. When you buy a laptop/PC with windows already on it, then that is called OEM windows and it is cheaper than the normal one as it is tied to the motherboard and if the motherboard is replaced, or dies you will need a new windows copy.