Windows Licensing Reference

HWID Digital License

Hardware-bound digital entitlement in Windows 10 and Windows 11

The digital license, also called a digital entitlement, is an activation mechanism introduced in Windows 10 that binds a Windows licence to a hardware identifier (HWID) registered with the Microsoft activation service. A device with a digital licence activates automatically over the internet without the user entering a product key.

The digital licence is the standard activation path for retail copies of Windows 10 and Windows 11, for devices that upgraded for free from Windows 7 or 8.1 during the 2015–2016 upgrade window, and for OEM-licensed consumer hardware. It supplements rather than replaces the Software Protection Platform; volume-licensed Enterprise editions continue to use KMS or AD-BA.

See also: Software Protection Platform, Product Key Types, Activation Troubleshooting.

History

The HWID-based digital licence shipped with Windows 10 in July 2015. With the November 2015 update (build 1511), the upgrade path was further simplified: installations could activate using a qualifying Windows 7 or 8.1 product key. Windows 10 version 1607 (Anniversary Update) added the ability to link a digital licence to a Microsoft account, enabling re-activation through the Activation Troubleshooter after a hardware change. Windows 11 carries the same mechanism unchanged.

Technical details

On a digitally licensed device the entitlement is stored against a hashed hardware identifier on the Microsoft activation servers. After OS installation the Software Protection Platform contacts the activation service, presents the hardware identifier, and receives an activation response without any local key material being entered. The result is visible in Settings › System › Activation as Windows is activated with a digital license (or … linked to your Microsoft account).

Hardware binding

The hardware identifier is computed from a set of relatively stable platform attributes, including the motherboard, chipset, and certain firmware identifiers. Adding RAM, replacing a disk, or changing a graphics card does not normally invalidate the binding. Replacing the motherboard, or transferring the disk to a fundamentally different system, typically does.

Linking a Microsoft account to the device — performed under Settings › Accounts › Your info › Sign in with a Microsoft account instead — records the digital licence against that account. After a hardware change, the user can sign in, run the Activation Troubleshooter, and re-apply the licence to the new hardware.

Reactivation after hardware change

  1. Sign in with the Microsoft account that the licence was linked to.
  2. Open Settings › System › Activation and select Troubleshoot.
  3. Choose I changed hardware on this device recently.
  4. Select the affected device from the listed devices linked to the account.
  5. Confirm; the SPP applies the entitlement to the new hardware identifier.

Common issues

  • Device not linked to a Microsoft account. The Activation Troubleshooter cannot re-apply the licence; re-activation requires contacting Microsoft support.
  • Edition mismatch after hardware change. The digital licence is bound to a specific edition (Home, Pro, etc.); installing a different edition will fail to activate even with matching hardware.
  • Virtual machines and cloned images. Cloning a digitally licensed installation produces a duplicate hardware ID and may revert the clone to a non-genuine state.
  • Firmware updates that change the SMBIOS UUID. Rare, but documented for some OEM firmware updates; resolved by Microsoft account-driven reactivation.

References

  1. Activate Windows — https://learn.microsoft.com/en-us/windows/client-management/manage-windows-10-in-your-organization-modern-management
  2. Reactivating Windows 10 after a hardware change — https://learn.microsoft.com/en-us/windows/client-management/reactivate-windows-after-hardware-change
  3. Windows activation overview (consumer) — https://support.microsoft.com/windows/activate-windows-c39005d4-95ee-b91e-b399-2820fda32227
  4. Get help with Windows activation errors — https://support.microsoft.com/windows/get-help-with-windows-activation-errors-ae9bd840-1672-de9b-7531-c2db89cbf334