I am having my MacBook Pro repaired and while it is being repaired, I've borrowed my brother's MBP. I thought if they replace the MBP logic board I may have some Window's licensing issues when I got my machine back. I backed up my MBP to an external drive before sending it in for repair. So, I booted my brother's MBP from my "system". Just out of curiiousity, I launched parallels and resumed the VM. It worked fine. So, is it safe to assume that Windows is tied to the software install and not the machine that it's installed on?