Anti-virus software often misses these because the ISO itself isn't scanned until you actually run the malware inside.

Windows 7 Eternity Edition is an unofficial, customized version of the classic Windows 7 operating system. Released in 2009 by enthusiasts known as the "Rockers International Team," this "bootleg" edition was designed to offer more speed, better stability, and a more visually engaging experience than the standard retail versions. What is Windows 7 Eternity Edition?

If you love the Windows 7 UI but want real security updates, try:

You don't need a shady custom ISO to keep using Windows 7. Here are legitimate (or semi-legitimate) ways to achieve a similar result.

Because this is not an official Microsoft release, it may contain security vulnerabilities, stability issues, or even malware. Microsoft officially ended support for all Windows 7 versions on January 14, 2020. Guide to Obtaining and Installing Windows 7 Eternity

To be unequivocally clear:

While the idea of a pre-activated, high-performance custom OS sounds appealing, downloading a Windows 7 Eternity ISO from the internet carries significant risks that outweigh the benefits.

In short, it’s a (or easily activatable) version of Windows 7 SP1, designed to make the OS feel modern and usable in 2025 and beyond.