If your hard drive is too small for Windows 10 64-bit, your actual solution is to upgrade your storage or switch to an officially supported lightweight Linux distribution (like Linux Mint Xfce or Zorin OS Lite), which offers a 1.2GB download that is 100% safe.

For those who absolutely need a stripped-down version, there is a reputable project known as "Tiny10." Created by a developer known as NTDEV, this is a modified ISO, but it is widely trusted in the tech community.

The "Windows 10 highly compressed" phenomenon is a testament to the ingenuity of the tech community, but it is a solution fraught with danger. For users with low-end hardware, a better alternative is often a lightweight Linux distribution or the official (Long-Term Servicing Channel) if available. While the space saved is impressive, the sacrifice of security and reliability is a price too high for most to pay.