Upgrading

Hi,
My question is very general, i dont have much knowledge about cubase, just want to know if the 2 things i will aks are possible.
I am sure it is very common.

I have old cubase ( i think 5 or 6 or 5.5) in my computer, and beside the fact that i havent used it in the last years, i dont upgrade it because i have many virtual instruments that are installed there, and this make me wanna ask 2 general questions:

  1. Is it possible to upgrade the cubase version ( somehow ) and keep those virtual instruments installed?
  2. Is it possible to upgrade the windows version ( i think i have win 7 there ) and keep cubase installed there, for the beginning i mean keeping the old cubase installed.

Thank you