Microsoft's official Windows 10 download page only offers the latest version (e.g., 22H2). To get 1507, use these methods:

, you must use third-party archival or automation tools for the 1507 build:

The elephant in the room is security. Without years of cumulative updates, an updated 1507 ISO remains vulnerable to hundreds of post-2017 exploits (e.g., EternalBlue variants). Thus, this ISO is only recommended for offline use, virtual machines, or networks protected by rigorous firewalls. Never use it as a daily driver on an internet-connected PC.

host various versions of 1507, including multi-language editions for x86 and x64 architectures. Enterprise/LTSC : If you have a Visual Studio (formerly MSDN) subscription

Windows 10 version 1507, also known as the "Initial Release" or "RTM" (Release to Manufacturing), was the first major release of Windows 10. It was built on April 24, 2015, and officially released on July 29, 2015. This version was a culmination of efforts from Microsoft to create a unified platform that combined the best features of Windows 7 and Windows 8.