Can't boot os

Sep 6, 2018
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So recenty I bought a new motherboard, cpu, ram, and psu. Being the intelligent guy that I am I installed everything without knowing that my os would fail. So now I'm stuck, my PC will post but fails to boot every single time, I've tried inserting a disc with windows install, I've tried booting it through a usb as well, I made sure to change boot order, I've been through advanced boot options but I literally can't get it to load the disc or usb it starts to load and then gives me the message "Reboot and select proper boot device or insert boot media into selected boot device and press a key" but every time I press a key, whether the disc or usb, or both is in, it just repeats the message. I need help bad. Just spent all this money for a brick