Windows 10 build 21273
| Build of Cobalt | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 21273 |
Windows 10 build 21273 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 9 December 2020.[1]