Windows 11 build 25900

Build of Gallium
OS familyWindows 11 (NT 10.0)
Version number10.0
Build number25900
Build revision1000
ArchitectureAMD64, ARM64
Build labrs_prerelease
Compiled on2023-06-30

Windows 11 build 25900 is a build of Gallium, the 24H1 development semester of Windows as a service. It was accidentally flighted to a small number of Windows Insiders in the Canary Channel at some point in July 2023, although a connection to Microsoft's internal corporate network was required to download the build. The existence of this build was discovered by a user who checked updates via Windows Update in build 25393 and posted a screenshot in the Inside Windows Telegram group, same as 25868 and 25921.