Windows 10 build 21280
| Build of Cobalt | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 21280 |
Windows 10 build 21280 is a build of Cobalt, the 21H2 development semester of Windows as a service. Issues related to this build were posted on GitHub by a Microsoft employee on 30 December 2020.[1][2]