Windows 10 build 20285
| Build of Iron | |
 | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Version number | 10.0 |
| Build number | 20285 |
| Build revision | 1 |
| Architecture | x64 |
| Build lab | fe_release |
| Compiled on | 2021-01-16 |
| Expiration date | |
| Timebomb | 2021-10-31 (+288 days) |
| SKUs | |
| Pro (Single Language, China) Pro Education Pro for Workstations Education Enterprise Enterprise multi-session IoT Enterprise | |
| About dialog | |
Windows 10 build 20285 is a build of Iron, the 21H1 development semester of Windows as a service.
Changes[edit | edit source]
- This build including the version shown in areas such as
winverand Settings is now 21H1 instead of 2004, though there is also aReleaseIdkey in the Registry with a 2009 value, much like in the October 2020 Update. The version value would be later changed to 21H2 in build 20289.
Container image[edit source]
This build was only officially released in the form of a Docker layer image file and has been optimized for use in a container. By default, it does not spawn an interactive session on boot, the Administrator account is password-protected and networking services are disabled compared to regular desktop builds.
In order to use this build in ordinary virtual machine solutions, it is required to convert the layer image to WIM format and then install the build by manually using dism.exe and bcdboot.exe. Before booting into the build, the number of initial sessions also has to be increased, otherwise the system will be seemingly stuck on the boot screen:[note 1]
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager]
"NumberOfInitialSessions"=dword:00000002
Notes[edit source]
- ↑ This is not required for Hyper-V enhanced sessions, which use Remote Desktop Protocol to control the virtual machine.