For Brazilian technicians maintaining older hardware (lottery terminals, industrial machinery, school computers), this ISO is invaluable. It saves hours of hunting for drivers and product keys.
| KB Number | Purpose | |-----------|---------| | KB4534310 | Monthly Rollup (final security fixes) | | KB4539602 | Fix for black lock screen issue | | KB4490628 | Servicing Stack Update (SHA-2 required) | | KB4474419 | SHA-2 code signing support | | KB4536952 | New SSU for January 2020 | | KB971033 | Windows Activation Technologies (WAT) – beware, may cause activation issues with loaders | windows 7 sp1 dualboot 31in1 oem esd ptbr jan
\sources\install.esd (or install.wim) – The core 31 editions \sources\boot.wim – Windows PE environment for installation \sources\setup.exe – Customized setup with OEM menu \sources\$OEM$\$$\Panther\unattend.xml – Answer file for automation \boot\ – UEFI and Legacy boot files \efi\ – Microsoft EFI bootloader for modern PCs \OEM\ – Folder containing logos, scripts, and activation tools \Tools\ – Optional: Windows Loaders, USB 3.0 drivers, NVMe patches \Readme_PTBR.txt – Instructions (usually from the uploader) | Index | Edition Name | Architecture | |-------|--------------|--------------| | 1 | Windows 7 Starter | x86 | | 2 | Windows 7 Home Basic | x86 | | 3 | Windows 7 Home Premium | x86 | | 4 | Windows 7 Professional | x86 | | 5 | Windows 7 Ultimate | x86 | | 6 | Windows 7 Enterprise | x86 | | 7-12 | Same as above (1-6) with N variants | x86 | | 13-18 | Same as above (1-6) but x64 | x64 | | 19-24 | Same as x64 N variants | x64 | | 25 | Windows 7 Professional OEM (Positivo) | x64 | | 26 | Windows 7 Ultimate OEM (Dell) | x64 | | 27 | Windows 7 Home Premium OEM (HP) | x64 | | 28 | Windows 7 Professional OEM (Lenovo) | x64 | | 29 | Windows 7 Ultimate OEM (Acer) | x64 | | 30 | Windows 7 Enterprise VL (Volume License) | x64 | | 31 | Windows 7 Embedded POSReady 7 – often included for updates | x64 | While Microsoft officially ended support for Windows 7
Introduction: A Niche Legend in System Preservation In the vast ecosystem of Windows operating systems, few custom builds have achieved the cult status of the Windows 7 SP1 DualBoot 31in1 OEM ESD PTBR Jan image. While Microsoft officially ended support for Windows 7 in January 2020, the demand for a stable, versatile, and region-specific edition remains surprisingly high in Brazil and among Portuguese-speaking technicians. And always remember: This article is for educational
However, for everyday users, the security risks and legal grey areas make it a poor choice for a daily driver. Use it on isolated networks, air-gapped machines, or inside a virtual machine. And always remember: This article is for educational purposes only. The author does not condone software piracy. Always use genuine, licensed operating systems supplied by Microsoft or authorized OEM partners.