An anonymous reader shares a report: In December 2022, we published a short PSA, reminding users they could still activate Windows 11 and 10 with valid Windows 7, 8, and 8.1 keys. This practice dates back to 2015 when Microsoft launched Windows 10 with a one-year free upgrade window. Besides letting Windows 7/8 users upgrade for free to Windows 10, Microsoft allowed activating its newest OS using keys from the previous releases.
Upgrade from Windows 7 and 8 to Windows is no longer possible, and it now seems that Microsoft is removing the loophole to prevent users from activating Windows 11 with old Windows license keys. As spotted by Deskmodder, Microsoft published a message on the Device Partner Center, notifying customers that the installation path to obtain free upgrades from Windows 7 and 8 to more recent Windows versions is no longer available. What it means is that you can no longer update from Windows 7/8/8.1 to Windows 10 or 11.
