Some enthusiasts have managed to create "Lite" versions of Windows 7 that are under 100MB, but these versions have almost all features removed, including the Control Panel, networking, and the ability to run most programs.
The most common reality. These files are often Trojans or ransomware designed to look like a small "downloader" or "installer". windows 7 ultimate 64 bit highly compressed 10mb best upd
Some files are simply archives filled with empty "dummy" data to trick users into clicking. The Dangers of Using "Highly Compressed" ISOs Some enthusiasts have managed to create "Lite" versions
The Myth of Windows 7 Ultimate "Highly Compressed" 10MB Downloads including the Control Panel