When you double-click the installation file (file type .msix), Windows does not ask you to install it, but rather which application should be used to open the file.
Solution:
- Check the version of Windows: minimum Windows 10 (version 1709).
Check if the App Installer is installed on the laptop. If this program is not installed, you can download it from the Microsoft Store.
- If the version of Windows is recent enough and the App Installer is installed, please try installing the Installer Service Tool again (see: Installing the Installer Service Tool).