No. Running compact.exe /compactos:always on Windows 11 reduces size by about 2-3GB, not 5GB. The OS will still be multiple gigabytes.
At first glance, it sounds like magic. The official Windows 11 ISO file is over . How could anyone squeeze that down to just 100MB—smaller than a single minute of 4K video?
The concept of a is a technical impossibility with today’s compression mathematics and a dangerous trap for the uninformed. The files you find under this name are either:
Download the official ISO (using a friend’s fast internet or a public library). Then use (free tool) to create a USB drive with "Compact OS" mode. This installs Windows 11 with heavy compression, using only ~15GB of disk space instead of 25GB.
download should be treated as a major security risk. A standard Windows 11 installation requires approximately 5GB to 6GB for the ISO file alone. Why these downloads are dangerous