After October 10, 2017, Windows 10 devices running version 1511 will no longer receive security and quality updates. Advantage Business Systems 10-10-17 | A last look at Windows 10 Version 1511
Since version 1511 reached , Microsoft has removed it from the standard Windows 10 Download Page . However, there are still official and unofficial ways to acquire it: Windows 10 version 1511 no longer available - update now! windows 10 1511 iso