Currently, Microsoft SharePoint Server 2013 is not supported for installation on computers running the Windows Server 2012 R2 operating system.
Installing SharePoint Server 2013 on a computer that is running Windows Server 2012 R2 could lead to unexpected behavior, therefore, Microsoft does not support SharePoint Server 2013 in Windows Server 2012 R2.
SharePoint Server 2013 with Service Pack 1 and SharePoint Foundation 2013 with Service Pack 1 will offer support for Windows Server 2012 R2. The release date for Service Pack 1 for SharePoint Server 2013 and SharePoint Foundation 2013 is to be determined. This article will be updated as more information becomes available.