How to download Windows 10 ISO files from Microsoft Website ... However, if you are looking for previous versions, including 21H2, 20H2, and initial Windows version files from 2015, AdGuard ...

If you're on Windows 10 version 20H2 or 2004, you're going to get KB5000802 ... This might also happen when using outdated physical media or ISO images that do not have the latest updates integrated.