One of the best improvements with Windows Server 2012 was the ability to switch from a full server GUI to Core and back and forth between them. For instance, lets say you install a RODC with a full GUI and then decide that you want to manage that RODC remotely using remote management tools. With Server 2012 you are able to drastically decrease your attack surface area by removing the GUI. It also decreases your vulnerability and maintenance since many of the Windows Updates are patches for the GUI. You can of course do this through the GUI of your central management server with the Add/Remove server features but Powershell is way more fun!
To remove the GUI
Step 1: Enable Remote Administration
This will enable remote administration.
Step 2: Uninstalling the GUI
Uninstall-WindowsFeature Server-Gui-Mgmt-Infra, Server-Gui-Shell –Restart (Also using “–Remove” actually removes the underlying binaries)
To reverse your actions and install the GUI use the below commands.
To install the GUI:
Install-WindowsFeature Server-Gui-Mgmt-Infra,Server-Gui-Shell –Restart
This will will install the GUI and restart the server. It is literally that easy! Now if you want to keep a GUI just in case but you don’t need a full feature OS Server 2012 also has a minimalist GUI. Use this command to install the minimal interface from a core installation