Windows 10 build 21274
| Build of Cobalt | |
 | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 21274 |
| Build revision | 1000 |
| Build lab | rs_prerelease |
| Compiled on | 2020-12-02 |
| SKUs | |
| Enterprise | |
Windows 10 build 21274 is a build of Cobalt, the 21H2 development semester of Windows as a service. A comment related to this build was posted to GitHub by a Microsoft employee on 4 December 2020.[1] A screenshot of this build was later posted to GitHub by another Microsoft employee on 9 December 2020.[2]