If it is possible to activate w10 with w7 key then, everything is fine and strategy is clear :) that grub was meant in the case i went with upgrade on top of w7 and not clean installation but, now...

Hi everyone,
I'm planning to buy SSD drive to my laptop, and i would like to know what is the easiest way of upgrading to new W10.
The question is whether:
1. Can i do clean installation of ...