Some early leaked builds of Windows 11 had different internal identifiers, but the standard naming convention follows the YYHx format (e.g., 21H2, 22H2).
The Windows 11 version 21H2 update history on Microsoft Support catalogs every build from the initial launch through its end of service. Search results for Windows 11 (2105)
It is important to note that Version 21H2 reached its end of servicing on October 8, 2024. The Windows 11 Release Health page at Microsoft Learn explains that devices on this version should be updated to a newer version like 23H2 or 24H2 to continue receiving security updates. Common Confusions Some early leaked builds of Windows 11 had
Are you trying to that shows "2105," or
The base build number for that original release, with early preview builds like 22000.51 appearing in June 2021 (which corresponds to the 06/21 timeframe). The Windows 11 Release Health page at Microsoft
The original launch version of Windows 11, released in October 2021.
For a deep dive into the features that defined the first version (Build 22000), Hands-on with Windows 11 Build 22000.51 provides a visual tour of the redesigned Start menu, Taskbar, and Widgets introduced in mid-2021.