Select "Custom: Install Windows only (advanced)" for a clean installation.
Always back up existing data, especially for infrastructure servers like DHCP . 2. The Installation Process
32 GB minimum; use GPT partitioning for disks larger than 2 TB. Installing and Configuring Windows Server 2012 ...
Choose your language, time format, and keyboard layout. Choose Edition: Select between Standard or Datacenter .
Crucial Step: You must choose between (command-line only) and Server with a GUI . Select "Custom: Install Windows only (advanced)" for a
Insert your DVD or USB and adjust the BIOS/UEFI boot order to prioritize the installation media.
Set a complex administrator password once the system reboots. Installing and Configuring Windows Server 2012 ...
512 MB RAM (minimum), though 2 GB or more is standard.