https://wccftech.com/last-chance-get-windows-10-free/

Windows 10 is now on 600 million active devices

In October, Microsoft first mentioned its plans to end the Windows 10 free upgrade offer for Windows 7, 8 and 8.1 users who use assistive technologies. Following the first year of free Windows 10 upgrade offer, users were still able to get the new operating system for free by simply going with the assistive technology workaround. All that users need to do is head over to Microsoft’s accessibility website, say you use assistive technologies on your Windows 7 or 8 system, and download the new Windows version.