Issue

Windows 10 version 20H2 (19042.572) was released on October 20, 2020. Due to a publishing mistake in the media's WIM metadata, Imaging Toolkit identifies the media as 19041.508 which matches Windows 10 version 2004 (updated September 2020) media.


Solution

Follow these steps to create a 20H2 deployable base image.

  1. Download then mount the Windows 10 (business editions) version 20H2 VL ISO media.

  2. Ensure the machine running Build Console has Windows ADK / WinPE add-on 2004 installed.

  3. In Build Console, import the 20H2 Windows media.

    Note: Ignore the "19041 (Sep '20)" media description as this is hardcoded into the media.

     
  4. Create a new project or open an existing project then use Save As to make a copy.

  5. In the project, specify the Windows 10 edition, which will also carry the 19041 (Sep '20) naming.

  6. Save and validate the project.

  7. Run Deployment Wizard to create the new base image preparation process.

    If you selected to create a bootable WinPE ISO, rename the output filename from "win10-ent-x64-19041-pe.iso" to "win10-ent-x64-19042-pe.iso".

  8. Run Integration Wizard to generate a new projects.ini.

    Edit the projects.ini section for the 20H2 project replacing the base_image and efi_boot_image (if present) value from "19041" to "19042", e.g. "win10-ent-x64-19042-postsp".

  9. Create the base image as usual then test the deployment.