Windows 10: Activating Windows on pc with new hardware

Im trying to activate windows on my pc with new hardware but I think I copied the product key wrong so it wont activate. I got windows 10 from a free update from 8.1. I cant seem to find my product key on my Microsoft account though my account does see both the old pc and this new one. is there anyway to get it activated on this pc and deactivated on the old since I no longer have that hardware?

:)

 

Activation of Windows 10 on new PC

I've recently built a new computer and am trying to activate Windows 10 on it. I have a digital licence that's tied to my Microsoft account, but when I try to go through the activation steps via the "My hardware recently changed" option, it doesn't show
my new computer on the list, though it does show the old one I'm trying to transfer the licence from. I have signed in on both with the same Microsoft account, and both are listed as devices connected to my account. I've tried signing out of my Microsoft account
and back in on both of them, to no effect. It was a free upgrade from Windows 7, but I made sure to activate it to tie it to my account.

 

windows activation—hardware changed siginficantly

From time to time on my thoroughbred PC, I get a Windows activation message that says my hardware changed siginificantly and I have to re-activate Windows. My hardware hasn't changed any more than a network card (went from a wireless g card to onboard lan to a wired network card), and the install is legit. Why is it doing this, and how can I stop it?

 

Activating WIndows 10 after hardware change.

Before replacing my hardware on my main computer, I logged into my Microsoft Windows account. Once logged in, I saw that the name of the PC that I was upgrading was in my list of PCs that were activated for Windows 10 Pro. So after reviewing how to reactivate
after a HW changed, I went ahead and upgraded the motherboard, CPU and memory in that PC.

Now, when it is time to reactivate, the PC in question is still listed in the hardware list on my MS account but it will not allow me to activate Windows. I followed the instructions online and ran the troubleshooting tool. It then gave me the following
response:

Unable to activate Windows

We can’t find any devices linked to your Microsoft account that can be used for reactivating the device you’re using right now. Make sure you’re signed in with the same Microsoft account you linked to the
Windows 10 digital license on this device or try again later.

See other devices linked to your Microsoft account

So why would it not find the license that was for this PC when it had the old hardware installed? My assumption, albeit may wrong, was that the PC was activated because it was in the list. It was also activated as a Windows 10 Pro edition.

Anyone have any suggestions on this type of issue?