====== Switch Windows Server 2012 between core and GUI ======

===== Convert initial Core to GUI =====
  - Mount the Windows Server 2012 ISO to the host.
  - open an administrative command prompt
  - mkdir c:\mount
  - check your wimfile to determine the correct index for the OS (mine was 4) -the command is dism /get-imageinfo /ImageFile:d:\sources\install.wim
  - dism /mount-wim /wimfile:d:\sources\install.wim /index:4 /mountdir:c:\mount /readonly
  - powershell (enter PowerShell prompt)
  - install-windowsfeature server-gui-mgmt-infra,server-gui-shell –restart –source c:\mount\windows\winsxs
  - Unmount Wim (dism /unmount-wim /mountdir:c:\mount)
  - Remove Mount Directory (rmdir c:\mount)
Alternative is to install directly from WIM
  - Install-WindowsFeature server-gui-mgmt-infra,server-gui-shell -restart -Source wim:d:\sources\install.wim:4


===== Convert GUI to Core =====
This will not remove the install files, so you can later use the single line add-windowsfeature commend (without all the steps above). To completely remove the binary files, add **–Remove** at the end
  - Uninstall-WindowsFeature Server-Gui-Shell, Server-Gui-Mgmt-Infra
  - Shutdown –r -t 0 (Reboot)

===== Convert Core to GUI =====
You can do this if you allready have GUI feature files on your system
  - Install-WindowsFeature Server-Gui-Shell, Server-Gui-Mgmt-Infra -restart
  - Shutdown –r -t 0 (Reboot)