Sorry I'm new at this. I just got all my parts together and also a really cool case without a slot for the drive. H440 it is. I see some people build Gaming pc and they just fast foward to the point where they already install Windows into their PC (ones without the drive slot). I'm wondering what other way to install this? Do I have to download it from Microsoft? Will pirate works? wait I can't even use my PC yet how do I even install it in?