Hi Jamaro
My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.
It depends on how Windows 10 was originally configured on your computer.
If its a full retail store bought license online or offline, it is transferable to a new computer or motherboard.
If its the free upgrade from a retail store bought Windows 7 or Windows 8 license, it is transferable to a new computer or motherboard.
If its the free upgrade from a OEM preinstalled Windows 7 or Windows 8 license, it is NOT transferable to a new computer or motherboard.
Learn more about transferring your license:
http://www.groovypost.com/howto/transfer-window...
If its a retail license, learn how to reactivate:
http://www.groovypost.com/howto/activate-window...
You could try chatting with support agent and explain the situation in detail and they might be able to activate it. We were able to confirm with Microsoft under some circumstances, OEM licenses can be reactivated even under the free upgrade offer. Its not guaranteed every support agent will do it though, but you can try your luck.
Microsoft's view is, as long as you are not abusing the license, you should get a pass.
Activate Your Windows 10 License via Microsoft Chat Support
Use the following link to directly reach a live agent who can assist you:
https://partner.support.services.microsoft.com/...
You have a retail license, so all you need to do is contact chat support and explain the issue and they will reactivate it for you:
https://partner.support.services.microsoft.com/...
You can also call support:
https://support.microsoft.com/en-us/help/13948/...