Windows 10: Re-activate Windows 10 Pro after transferring HDD to new PC

Hi,I don't know the full history of the old PC, but do know that it was licensed for Windows 10 Pro before the motherboard died and the HDD was placed in a new, barebones PC. There doesn't seem to be a Microsoft Account that we have access to that might have had a "Pro license purchase" associated with it.When I go to the MS store to attempt the $99 upgrade purchase, all I can find is a $199 purchase for the entire OS. Therefor, I have two questions:Can I use a publicly available key for Windows 10 Home and then find the $99 upgrade to re-activate the Pro license?If not, will the $199 purchase

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Transferring Windows 10 to New PC Activation

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:

• How to Transfer your Windows 10 License to a New Computer

If its a retail license, learn how to reactivate:

• Activate Your Windows 10 License via Microsoft Chat Support

 

Transfer Windows 10 Pro digital license to new PC build

I have built a new PC and I am trying to transfer my Windows 10 Pro license from my existing PC to the new one. Unfortunately, the license is not activating properly. I have deactivated the previous license by running the command "slmgr /upk" in an elevated
(Run as Administrator) command prompt.

I can see that the license is now deactivated given the fact that the old PC is now asking me to activate. I still cannot, however, activate the license on the new PC. The original license was a Windows 7 Home Edition license that I had upgraded to Windows
10 Pro for free over the past few years. I am unable to use that original license as it's for a Home Edition license and not a Pro. I was, however, allowed to upgrade to Pro when Microsoft was offering the free upgrades. I also transferred the license to my
Microsoft Account, so I do not have a product key associated with Windows 10 Pro.

My plan is to transfer the SSD and HDDs in the old PC to the new and not use the old PC. I am unable, however, to activate the new PC. Any help would be much appreciated.

 

transfer windows 10 to new pc?

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:

• How to Transfer your Windows 10 License to a New Computer

If its a retail license, learn how to reactivate:

• Activate Your Windows 10 License via Microsoft Chat Support