Technically speaking the Windows 10 free upgrade through the Get Windows 10 (GWX) app ended on July 29, 2016. That’s what Microsoft officially said.
Now if you want to get Windows 10, it is available for purchase, either on a device or as a full version of the software. However there “is a trick” and you can still upgrade to Windows 10 for free before the deadline January 16,2018.
If you use Assistive Technologies , you can upgrade to Windows 10 at no cost as Microsoft continues to improve the Windows 10 experience for people who use these technologies. Please take advantage of this offer before it expires on January 16, 2018.
Microsoft does not ask for any proof of whether you use Assistive Technologies or not,so you have nothing to worry above whether you qualify for the free upgrade or not.
To save you time with more stories on what Assistive Technology route is here is the link to get your free Windows 10 upgrade.