Ok guys, my motherboard died a couple of days ago and i sent it for repair, but they couldn't fix it so i bought a new one. After i installed it, i tried to install win 10 only to find out that my hdd is dead, so i bought a new one. My question now is what do i need to do to activate my OS. I had windows 10 upgraded from my win 7 but i dont have that win 7 installation CD, only win 10 on an usb stick.