My computer cannot open/ install the MSIX file, what can I do to solve this?

MSIX works by default on Windows 10/11, but can be blocked. Check these options (optionally with your ICT support):

1. Enable sideloading

Go to Settings → Privacy & Security → For developers Turn on Developer mode (or at least “Sideloading apps”)

2. Install/update App Installer

Search for “App Installer” in the Microsoft Store and update it. This is the component that handles .msix files

3. Trust certificate

Right-click on the .msix file → Properties → Digital signatures tab Install the certificate under “Trusted people” or “Trusted root certification authorities”. Then try installing again.

4. Install via PowerShell

PowerShell Add-AppxPackage -Path “C:\path\to\file.msix”