It sounds like you're referring to a specific custom Windows 10 ISO — likely from a scene release group (e.g., Generation2 or similar) labeled as "Windows 10 21H1 16in1 en-US x64 – Integral Edition".
The most compelling feature is the 16-in-1 configuration. Unlike retail ISOs that split editions into separate "Consumer" and "Business" volumes, this single image hosts all sixteen variants. Here is what you get inside the sources\install.wim file: Windows 10 21H1 16in1 en-US x64 - Integral Edit...
Whether you are a technician managing 100 machines or a power user who reformats biannually, this ISO is the Swiss Army knife of Windows deployment. Keep it on an exFAT-formatted USB, and you will never reach for a vanilla Microsoft ISO again. It sounds like you're referring to a specific
Windows 10 21H1 16in1 en-US x64 Integral Edition is an unofficial, community-made distribution of Windows 10. These "Integral Edition" releases are typically modified to include specific updates, drivers, and pre-configured settings. Key Characteristics of "Integral Edition" Builds Modified Installation Media Here is what you get inside the sources\install