The Windows Store app allows you to install and update Universal apps in Windows 10. Thanks to the Store, apps can be installed with one click. By default, Windows Store is set to update apps automatically. It caches some details about installed and available apps to speed up the process of browsing them and improving the responsiveness of the Store app. However, sometimes the Store app fails to update apps or you may also be unable to install new apps. In such a case, you need to reset the Windows Store cache.