GNU/Linux: software center; install
Android/Linux: system app store; install
Windows/NTOS: web browser; maybe verify website url?, download, open, run as administrator, next, next, next, next, next, next, next, next, next, next, next, next, next, next, finish!
True, also I'd rather embrace the Microsoft store (which is also sometimes used as source for winget) than going on the internet and downloading those annoying executables, I'm disappointed that much free software doesn't have official listings on the store, when it has, it's often paid for which is cool, but as a broke and security aware user I'd like another gratis option too, maybe somehow buried under a pile of other results.
Also, kinda unrelated, but it seems that the repositories of historic Windows-native free software is plagued by being hosted on the hideous SourceForge and that makes me instantly run away when I have to search for issues, let alone opening new ones