Windows Server 2012 R2 Core – now a default option for installation. After finishing the installation, you see just a command shell – black screen, grey letters. We are used to GUI – but managing a server core is not a hard task. You can use everything you really need – Server Manager, MMC consoles and, of course, remote PowerShell. All you must do – is complete some simple initial tasks and configure your server for remote management.
Features on Demand – a new way of conserving system partition space in Windows 8 and Server 2012. It is possible not only uninstall a feature, but delete files associated with that feature – they are called payload. You can install a feature again when you need to, but you`ll have to provide a valid installation source. This feature can be used when working with installed operation system – for saving useful system partition space – or with installation media for reducing the size of the image.