Windows 10 build 9780
|Build of Windows 10|
|Timebomb||2015-07-15 (+388 days)|
Windows 10 build 9780 is a pre-Technical Preview build of Windows 10. This build was leaked on or a little before 2019-01-26. This build is currently the earliest leaked build of Windows 10, and due to its earliness it is identified as Windows 8.1 in many areas and still has kernel version 6.3.