Faça o download deste arquivo para reparar o problema: Media Feature Pack para as versões N e KN do Windows 8.1
The Media Feature Pack for N and KN versions of Windows 8.1 will install Media Player and related technologies on a computer running Windows 8.1 N or Windows 8.1 KN editions. For further information, please see http://support.microsoft.com and query the Knowledge Base for the article number KB2835517.