Windows 10 build 21298
| Build of Cobalt | |
 | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 21298 |
| Build lab | rsmaster |
Windows 10 build 21298 (rsmaster) is a build of Cobalt, the 21H2 development semester of Windows as a service. An issue related to this build was posted on GitHub by a Microsoft employee on 11 February 2021.[1]