Updating Microsoft Vista to Windows 8

I have a number of Steinberg programs - Virtual Guitar, Drummer, Halion and Cubase 7 - which as it turns out doesn’t play with Vista. So my question is will I have to re-install all of the existing programs. Problem being that I downloaded Cubase 7 and I’m not sure I can lay my hands on the actual CD’s for the others. I have a valid eLicense / Stick.