When a new version of Windows 10 is released, Microsoft releases new ISO disk images of the operating system to perform clean installs or create a bootable recovery environment. Microsoft recommends using their Windows 10 Media Creation Tool (MCT) to download the latest ISO image. It is possible to trick Microsoft’s website into offering an ISO image instead by changing your browser’s user agent to a non-Windows operating system. This article provides two ways you can download the. latest Windows 10 ISO images from Microsoft.
Source: https://www.bleepingcomputer.com/news/microsoft/how-to-download-the-latest-windows-10-iso-from-microsoft/