Here is the technical content breakdown for a Windows 7 SP1 DualBoot 31in1 OEM ESD PT-BR (January) image. This describes the structure, editions, and technical specifications of such a custom build.
The boot menu (via bootmgr ) allows you to choose either the 32-bit or 64-bit version of Windows PE (Preinstallation Environment). From there, you select the specific edition. windows 7 sp1 dualboot 31in1 oem esd ptbr jan
This must be Disabled in your BIOS/UEFI settings. Windows 7 does not support it. Here is the technical content breakdown for a
The terms and "ESD" speak to the evolution of digital distribution. "OEM" (Original Equipment Manufacturer) refers to the version of Windows pre-installed on a store-bought laptop, locked to the motherboard. Traditionally, these were distributed on physical recovery discs. However, "ESD" (Electronic Software Delivery) represents the modern shift away from physical media to digital downloads. The combination of the two suggests a repacked image designed for modern deployment—likely a WIM (Windows Imaging Format) file compressed to an ESD format to save space. It signifies From there, you select the specific edition
: Features a unified boot menu that allows users to choose between installing 32-bit or 64-bit versions from the same media. Integrated Updates