Guys... 1 question. I'm using Win 10 Pro upgraded from Windows 8.1. Been using it for the past 6-7 months without hiccup. However... am thinking of upgrading to ssd... will i be able to reinstall Win 10 without the serial key...? I have downloaded Win 10 from the media creation app and heard that once pc have been installed with Win 10, the serial key will be permanently bound to the hardware... in this case... the motherboard...