https://wccftech.com/trying-to-install-windows-10-for-free-but-unable-to-upgrade-here-is-why/

Windows 10 1909 Release Gets Closer But Some v1903 Bugs Are Yet to be Addressed

We have time and again shared how you can still install Windows 10 for absolutely free – the legit and official way – and update your Windows 7 or 8.1 machines ahead of the end of service deadline in January 2020. While Microsoft was supposed to stop offering Windows 10 for free in 2016, the upgrade offer continued to work as hinted by the software maker itself in a statement sent to me back in 2017.