If you follow the TechNet article “Deploy Office Web Apps Server”  to prepare a Server 2012 you need to run this PS> Add-WindowsFeature Web-Server,Web-Mgmt-Tools,Web-Mgmt-Console,Web-WebServer,Web-Common-Http,Web-Default-Doc,Web-Static-Content,Web-Performance,Web-Stat-Compression,Web-Dyn-Compression,Web-Security,Web-Filtering,Web-Windows-Auth,Web-App-Dev,Web-Net-Ext45,Web-Asp-Net45,Web-ISAPI-Ext,Web-ISAPI-Filter,Web-Includes,InkandHandwritingServices

works fine,  but if you plan Lync 2013 you will see a message like this when presenting: “Some presenting features are unavailable due to server connectivity issues”. This because the features NET-Framework-Features and NET-Framework-Core” is missing.

Add this to the PS above: NET-Framework-Features, NET-Framework-Core -source d:\sources\sxs\

Thanks to my collegues in UCDaily.net