Windows 10: What do I do

I recently installed windows 10 on my pc that o just built. It installed fine, I shut it down took out the windows key and and went back to it later that day. It didn’t boot. I went to bios and made sure that is was the first boot priority and tried booting from bios. It still didn’t boot so I tried putting the windows key in it again and went to repair computer tried repair, trouble shoot and nothing was working so I tried just continuing back to windows 10 and it booted and was fine. Then shut it down went back to it later and it booted fine again. I figured that if I have to keep the windo

:)