I really can't remember. I also download Windows 10 from MS official website, burn that onto a DVD. And went through the installation process. I did that more than 18 months ago, can remember if bootcamp gave me any warming / error (from memory, didn't, but can't sure). Anyway, if that happen to me, I will put in the Win 7 disc, let bootcamp run. And swap disc just before reboot to let bootcamp continue the installation process.