The built-in administrator account must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
WN08-SO-000001	WN08-SO-000001	WN08-SO-000001_rule		Medium

Description
The built-in administrator account is a well-known account subject to attack. It also provides no accountability to individual administrators on a system. It must be disabled to prevent its use.

STIG	Date
Windows 8 Security Technical Implementation Guide	2012-11-21

Details

Check Text ( C-WN08-SO-000001_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Accounts: Administrator account status" is not set to "Disabled", this is a finding.

Fix Text (F-WN08-SO-000001_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Accounts: Administrator account status" to "Disabled".