The classic logon screen must be required for user logons.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48228r1_rule The classic logon screen must be required for user logons.

Vulnerability discussion

The classic logon screen requires users to enter a logon name and password to access a system. The simple logon screen or Welcome screen displays usernames for selection, providing part of the necessary logon information.

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Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Logon -> "Always use classic logon" to "Enabled".

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