If you try to use an app that is not available in the Windows Store, you will see a reminder that apps used with Windows 10 S must come from the Windows Store. In some instances, you may also see a suggestion for a category of similar apps or a specific app that is already available in the Windows Store. Note that some developer tools will not be supported for use on Windows 10 S and a small number of apps with known compatibility issues will have notice of the issue included in the app’s product detail page in the Windows Store. Ultimately, if you want to download an application that is not in the Windows Store or has compatibility issues, you can choose to switch out of Windows 10 S configuration to Windows 10 Pro.
