You're looking for a feature to download Windows 8.1 ISO. Here are the steps:
Microsoft still provides the ISO via a tool, but you need a product key to access it. descargar windows 8.1 iso
Choose to save it to your PC.
On older hardware with limited RAM, Windows 8.1 often feels faster because it has fewer background processes than Windows 10 or 11. You're looking for a feature to download Windows 8
– the file will be about 3–5 GB.