To download and install the , you must download the Windows Assessment and Deployment Kit (ADK) and its corresponding WinPE Add-on .

The onecoreuap designation refers to "OneCore Universal App Platform," which is the foundational set of APIs shared across all Windows devices. The x86-en-us portion indicates that this specific MSI contains the boot files in English (US) .

This file is via Microsoft’s consumer download pages. Instead, it is extracted or delivered as a sub‑component when you install Windows ADK (Assessment and Deployment Kit) or Windows PE add‑on for the ADK .

windows pe boot files -onecoreuap--x86-en-us.msi is a specific installer component of the Windows Assessment and Deployment Kit (ADK) . It contains the base boot files for the 32-bit (x86) version of Windows Preinstallation Environment (WinPE). Microsoft Learn Critical Note: x86 Support Changes