You enable the Local Administrator account by using unattended.xml, and then you log onto that account in order to perform image customization.
Or, you boot into audit mode in order to perform image customization (which actually uses the Local Administrator account).
In this scenario, when users arrive at the Start screen after the Out-of-Box Experience (OOBE) process, they see only five app tiles instead of seeing the default Start screen that contains all preinstalled app tiles.
This problem occurs because of some registry keys related to app registration that are not cleaned up correctly during the media refresh process. These registry keys cause problems for app registration tasks for end-users during the first logon.
To work around this problem, you have to clean up the AppReadiness registry keys. To do this, use one of the following methods.
Mount the installation media and the HKLM registry hive offline, and then delete the AppReadiness registry keys. To do this, run the following commands from the command prompt:
Registry keys related to per-user app installation are not cleaned up as needed after audit mode customizations. As a result, in-box apps fail to install, which causes the five-tile Start screen layout.
This problem is scheduled to be resolved in the next media refresh.