The phrase describes something that does not exist in any legitimate or technically feasible way. Writing an article that implies otherwise could mislead readers.
While legitimate modded ISOs did exist on enthusiast forums, they were actually than standard Windows 7 ISOs—not smaller—due to the inclusion of heavy graphical assets, custom media, and pre-packaged driver bundles. Safer Alternatives for Low-End Systems Windows 7 alienware highly compressed 5 mb free 28
Some "highly compressed" files do not actually contain the OS data. Instead, they contain instructions that force your computer to extract and generate blank system files locally during the decompression process. The Reality: What Happens When You Decompress It? The phrase describes something that does not exist
Instead of risking your system, you can install a standard, legitimate version of Windows 7 and apply customization packages safely: Instead of risking your system, you can install
These custom ISOs usually came with: