| Build of Cobalt | |
 | |
| OS family | |
|---|---|
| Architecture | |
| Compiled | |
| Timebomb | |
| Works in | |
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]