Computerworld - https://www.computerworld.com/article/3265753/microsoft-windows/microsoft-to-finally-retire-windows-10-1511-in-two-weeks.html#tk.rss_all
Microsoft in two weeks will finally retire a 2015 version of Windows 10, marking 29 months of support for the untitled feature upgrade, nearly as long a stretch as the time between the releases of Windows 8 and Windows 10.
Windows 10 1511 – Microsoft labels its feature upgrades in a yymm format – will receive a final set of security patches on April 10.
[ Further reading: How to handle Windows 10 updates ]
The retirement date had originally been slated for Oct. 10, 2017, but last November Microsoft extended it an additional six months, albeit only for commercial customers. “To