Run msixbundle = use App Installer or Add-AppxPackage in PowerShell. Never double-click without the right handler.

To run an msixbundle, don’t ‘open’ it – install it. And if Windows asks ‘how to open’, get the free App Installer first.

Jordan double-clicked it. Windows asked, “How do you want to open this?” Panic set in. Jordan emailed Alex: “The file won’t run. What’s an msixbundle?”