Try this in order:
- Check that the device is running Windows 11 and is fully up to date.
- Press Start, type winver, and confirm the version.
- Run the Activation troubleshooter.
- Go to Start > Settings > System > Activation > Troubleshoot.
- This option appears only when Windows is not activated.
- An internet connection is required, and administrator access is required.
- If the device recently had a major hardware change, use the reactivation flow.
- In Start > Settings > System > Activation > Troubleshoot, select I changed hardware on this device recently.
- Sign in with the Microsoft account linked to the digital license.
- Select the current device from the list, check This is the device I’m using right now, then select Activate.
- If there was no digital license flow available, enter the product key.
- Go to Start > Settings > System > Activation > Change product key.
- Enter the 25-character key from the confirmation email, device packaging, or Certificate of Authenticity (COA).
- Verify the installed edition matches the license.
- In Start > Settings > System > Activation, check whether the device is running Windows 11 Home or Windows 11 Pro.
- If the license is for a different edition, Windows will not activate.
- If the error is related to connectivity, verify date/time and network.
- For error 0x80072F8F, check Start > Settings > Time & language > Date & time.
- Then run network troubleshooter from the taskbar search and fix any network issues.
- If activation still fails, check the specific error code shown on the Activation page and follow the matching fix:
- 0x800704CF: Windows did not find a valid license. Enter a valid product key or run the troubleshooter after hardware changes.
- 0xC004C003: The product key is not valid for this device. If the PC came with Windows preinstalled, contact the device manufacturer; if bought from a reseller, contact the reseller.
- 0xC004F034: The key is invalid or for a different Windows edition.
- 0x80004005: Run the Activation troubleshooter. If that does not work, a device reset might be required. Reset can remove apps and settings.
- 0x87e10bc6: Wait a few minutes, run the troubleshooter, then select Go to Microsoft Store if prompted.
If the troubleshooter does not fix it, contact support.
References:
- [Windows 11](https://support.microsoft.com/windows/activation/get-help-with-windows-activation-errors)
- [Windows 11](https://support.microsoft.com/windows/activation/using-the-windows-activation-troubleshooter)
- [Windows 11](https://support.microsoft.com/windows/activation/reactivating-windows-after-a-hardware-change#if-you-have-a-digital-license,-run-the-activation-troubleshooter)
- [Windows 11](https://support.microsoft.com/windows/activation/activate-windows#reactivate-windows-11-after-a-hardware-change)