Windows Server 2012: Convert server Core to server with a Gui

  1. Create a folder to mount a Windows Imaging File (WIM) in with the command mkdir c:\mountdir

  2. Determine the index number for a Server with a GUI image (for example, SERVERDATACENTER, not SERVERDATACENTERCORE) using this command at an elevated command prompt: Dism /get-wiminfo /wimfile:<drive>:sources\install.wim

  3. Mount the WIM file using this command at an elevated command prompt: Dism /mount-wim /WimFile:<drive>:\sources\install.wim /Index:<#_from_step_2> /MountDir:c:\mountdir /readonly

  4. Start Windows PowerShell and run this cmdlet:

    Install-WindowsFeature Server-Gui-Mgmt-Infra,Server-Gui-Shell –Restart –Source c:\mountdir\windows\winsxs

  5. Alternatively, if you want to use Windows Update as the source instead of a WIM file, use this Windows PowerShell cmdlet:

    Install-WindowsFeature Server-Gui-Mgmt-Infra,Server-Gui-Shell –Restart

Windows Server 2012: Convert a server with a Gui to Core with Windows PowerShell

To convert to a Server Core installation with Windows PowerShell: run the following cmdlet:
Uninstall-WindowsFeature Server-Gui-Mgmt-Infra -restart

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