I bought Windows 8.1 about a year ago, and have since then upgraded to Windows 10. I'm upgrading the motherboard and CPU, and I'm planning to format and reinstall Windows. Is there any ways to reactivate Windows on the new install and motherboard without buying a new key (I'm not gonna spend that much money when I already have bought a Windows key.[strike] If you have know about any activators I'm interrested.[/strike]