| Build of Cobalt | |
 | |
| OS family | |
|---|---|
| Architecture | x64 |
| Compiled | |
| Timebomb | |
| Works in | |
Windows 10 build 21306 is a build of Cobalt, the 21H2 development semester of Windows as a service. Issues related to this build were posted to GitHub by a Microsoft employee on 5 February 2021.[1][2]