Windows 10 build 21287.1004
| Build of Cobalt | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 21287 |
| Build revision | 1004 |
| Architecture | x64 |
Windows 10 build 21287.1004 is a build of Cobalt, the 21H2 development semester of Windows as a service. An issue related to this build was posted to GitHub by a Microsoft employee on 14 July 2021.[1]