DHCP Server Post-Install Wizard - Permissions Denied to Registry key

  1. Run this Powershell command to set correct settings on the registry key:
  2. Set-ItemProperty –Path registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ServerManager\Roles\12 –Name ConfigurationState –Value 2
  3. restart server
  4. complete DHCP Server Post-Install Wizard from Server manager

source: active directory - DHCP Post-Install configuration wizard hangs - Server Fault