If you need a lightweight, modern, 64-bit OS for low-end hardware, consider Windows 10 IoT Enterprise LTSC 2021. It is legally available (with a subscription or through OEMs), has a 10-year lifecycle, runs on 2 GB RAM, and has no Edge, Store, or Cortana. The install footprint is ~15 GB – far safer than any Tiny Windows 7 ISO.
Download the official Windows 7 SP1 x64 ISO from Microsoft (if you have a valid license key) or from trusted archival sites like the Internet Archive (where Microsoft has allowed certain MSDN disc images for historical purposes). Then, debloat it yourself using safe, audited scripts. Tiny Windows 7 X64 Iso Download
Tools to use:
This approach gives you a 10-12 GB install, which is not "tiny" but is stable, updatable, and clean. If you need a lightweight, modern, 64-bit OS
For users who need a specific Windows 7 application, install a lightweight Linux distro (e.g., Lubuntu or Linux Mint Xfce) and run Windows 7 in a virtual machine using VirtualBox. You can snapshot a clean, official Windows 7 install and keep it offline. This is the ultimate "tiny" solution for compatibility without risk. This approach gives you a 10-12 GB install,