Installation Guide
3. Setting Up Windows Server 2012
Express5800/T110f-S, R110f-1E Installation Guide (Windows)
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Chapter 1 Installing Windows
33. Type the password and press Enter.
Windows Server 2012 starts.
34. The following screen appears according to the contents selected (or displayed) in Step 19.
Server with a GUI
Server Core Installation
Tips
Refer to Microsoft Website for more details.
Configure and Manage Server Core Installations
http://technet.microsoft.com/us-en/library/jj574091.aspx