Microsoft no longer offers Windows 7 downloads directly. However, you can legally acquire the ISO via:

Standard UEFI firmware is designed for 64-bit operating systems.

: Modders take the 32-bit Windows 7 files and inject the 32-bit UEFI bootloader from Windows 8 or 10 The Result

This article is for educational purposes only. We do not condone or promote piracy or unauthorized use of software. Make sure to obtain a valid copy of Windows 7 x86 and follow the terms and conditions of the license agreement.

oscdimg -m -o -u2 -udfver102 -bootdata:2#p0,e,bC:\Win7x86\boot\etfsboot.com#pEF,e,bC:\Win7x86\efi\microsoft\boot\efisys.bin C:\Win7x86 C:\Win7x86_UEFI.iso