Below is a guide on how to get an official Windows ISO and the best practices for purchasing your license. 1. Download the Official ISO for Free
If you are looking for a specific type of ISO (like a "debloated" version), you can create your own rather than buying one from a stranger: Download Windows 10 - Microsoft buy windows iso
The safest but most expensive option. You can buy Home or Pro licenses directly through the Windows settings after installation. Below is a guide on how to get