The two Windows 10 Pro digital licenses created by the free Windows 8-to-10 upgrade cannot be transferred to your newly built computers; each new computer needs its own Windows 11 Pro license.
The free upgrade produced a digital license associated with the hardware of each original computer rather than a new transferable Windows 10 product key.^1^ Matching cases involving retail Windows 8 licenses upgraded to Windows 10 confirm that the resulting entitlement cannot activate Windows 10 or 11 on a different computer or motherboard.^2^
Activate the two new computers
For each new build:
- Install Windows 11 Pro.
- If Setup requests a key before you have purchased one, select I don’t have a product key and choose Windows 11 Pro as the edition.
- Complete installation and connect to the internet.
- Open Start > Settings > System > Activation.
- Select Go to Store or Open Store, then purchase a Windows 11 license for that computer.
- Confirm that the Activation page reports Windows as activated.
Windows 11 requires either a valid digital license or a 25-character product key. Microsoft documents purchasing a digital license through Settings > System > Activation > Go to Store.^3^
Purchase two licenses, because one Windows license cannot be activated on more computers than its license terms allow.^4^
If you already own separate Windows 11 Pro retail licenses
This is different from the Windows 8-derived licenses. For each new computer, enter its unused Windows 11 Pro key at:
Start > Settings > System > Activation > Change product key
The installed edition must match the license—use a Pro key with Windows 11 Pro. A digital license already assigned to the same eligible device can instead reactivate after you sign in with its linked Microsoft account.^5^
The hardware-change troubleshooter is not a workaround for transferring these Windows 8-derived upgrade entitlements to completely new computers. It applies when reactivating a device that has a valid digital license associated with it.
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