Let’s clarify the terminology. Microsoft never officially released a separate product called "Windows 7 UEFI ISO." Instead, the official retail and volume license ISOs for Windows 7 64-bit do contain UEFI support—but with major caveats:
Critical Note: Windows 7 does NOT fully support UEFI Class 3 (UEFI without CSM). You must enable CSM (Compatibility Support Module) or Legacy Boot in your BIOS, and disable Secure Boot. If your PC is UEFI Class 3 only (common on Intel 11th-gen and newer), you cannot install Windows 7.
Booting is only half the battle. Without USB 3.0 drivers, your mouse, keyboard, and USB drive will stop working the moment the installer loads. You need to inject them. Download Windows 7 Uefi Iso
Alternatively: Use NTLite (paid but powerful) to manually integrate drivers into the ISO before burning.
If you already have a genuine Windows 7 x64 SP1 ISO, convert it for UEFI: Let’s clarify the terminology
Microsoft still hosts the official Windows 7 SP1 ISO files on their servers, though the public web interface to access them has been obfuscated or removed. The most reliable method involves using a browser user-agent switcher to mimic a non-Windows operating system (which prompts the site to offer the ISO download rather than an executable downloader) on the Microsoft Software Download page. The file required is typically named with the convention Win7SP1_64bit_Retail_en-US.iso or similar, depending on the locale.
Note: The ISO downloaded directly from Microsoft includes Service Pack 1 (SP1). This is critical, as pre-SP1 ISOs lack the necessary updates for many modern UEFI implementations. Critical Note: Windows 7 does NOT fully support
You need the 64-bit version of Windows 7. UEFI does not support 32-bit installations on modern PCs (with rare Surface Pro exceptions).
Note: The file name usually looks like: en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso
Why SP1 is required: Windows 7 RTM (no service pack) does not support booting via UEFI at all. Service Pack 1 introduced limited UEFI support, but we will still need to modify it.