It ensures that the apps come from a trusted source and undergo certain quality and security verifications. Microsoft Store only: With this option, you can only install apps from the Microsoft Store.The “Choose where to get apps” option, however, provides additional options for app installation, including: It is basically a security feature that helps prevent the installation of unwanted or potentially harmful software.īy default, Windows allows you to install apps from the Microsoft Store, which is a safe and curated marketplace. The “Choose where to get apps” option in Windows allows you to control the source from which the system can download new programs on your computer.