Originally on Windows the app store was coupled to the sandboxed application model, on the theory that users would learn to associate installation from Store wi

Originally on Windows the app store was coupled to the sandboxed application model, on the theory that users would learn to associate installation from Store with safety and reliability-over-time. For better or worse, they were gradually decoupled over time and now Store accepts unsandboxed Win32 apps and sandboxed UWP apps can be installed from the web or otherwise outside the Microsoft store.