If it was a built-in app, the user would mist likely have to find a workaround or hope a store update flushed out the junk data interfering with the system. Whatever the issue, when it arose in Windows 10 version 1511 and below, the only recourse was to uninstall and reinstall the app in question. Perhaps its an issue with the Store app, preventing you from downloading and updating any of your already installed apps, or the mail app is crashing at launch for no obvious reason, or photos is playing hide and seek with your very important selfies. Sometimes an app on Windows 10 just doesn’t want to play nice.
