Windows 10 build 19489
| Build of Manganese | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 19489 |
| Build revision | 1000 |
| Architecture | x64 |
| Build lab | rs_fun |
| Compiled on | 2019-09-23 |
Windows 10 build 19489 is the earliest known build of Manganese, the 20H2 development semester of Windows as a service. A comment about this build was posted to GitHub by a Microsoft employee on 24 September 2019.[1]