Maybe this is a dumb question, but I wanna know before buying the new components 
I'm replacing my current PC with a new Skylake build. Thing is, I understand Skylake won't let me install Windows 7 as I've always done before with my own genuine Windows 7 DVD and Activation Code.
If this is the case, how do I install Windows 10? I also understand that (as with my current Ivybridge machine) I cannot just use my W7 Activation Code during Win10 installation. I have to install W7 first, then upgrade to W10 (as I've already done with current machine).
Arrghhh! This is so confusing!
So... how do I do it? Or do I not! Or do I just have to buy a genuine copy of Windows 10 too?

I'm replacing my current PC with a new Skylake build. Thing is, I understand Skylake won't let me install Windows 7 as I've always done before with my own genuine Windows 7 DVD and Activation Code.
If this is the case, how do I install Windows 10? I also understand that (as with my current Ivybridge machine) I cannot just use my W7 Activation Code during Win10 installation. I have to install W7 first, then upgrade to W10 (as I've already done with current machine).
Arrghhh! This is so confusing!
So... how do I do it? Or do I not! Or do I just have to buy a genuine copy of Windows 10 too?