Windows 10 Version 1511 (Build 10586), codenamed Threshold 2
Choose your desired Edition (Home/Pro), Language, and Architecture (x64 or x86). windows 10 version 1511 build 10586 iso
Microsoft increased the number of tiles allowed in the Start Menu and added a right-click context menu for Live Tiles. The menu also became more stable and responsive. Windows 10 Version 1511 (Build 10586), codenamed Threshold
If your project requires keeping the machine on Build 10586 indefinitely: Windows 10 Version 1511 (Build 10586)