The machine inactivity limit must be set to 15 minutes, locking the system with the screensaver.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253444	WN11-SO-000070	SV-253444r840185_rule		Medium

Description
Unattended systems are susceptible to unauthorized use and must be locked when unattended. The screen saver must be set at a maximum of 15 minutes and be password protected. This protects critical and sensitive data from exposure to unauthorized personnel with physical access to the computer. Satisfies: SRG-OS-000279-GPOS-00109, SRG-OS-000163-GPOS-00072

STIG	Date
Microsoft Windows 11 Security Technical Implementation Guide	2023-09-29

Details

Check Text ( C-56897r829414_chk )
If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: InactivityTimeoutSecs Value Type: REG_DWORD Value: 0x00000384 (900) (or less, excluding "0" which is effectively disabled)

Fix Text (F-56847r829415_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive logon: Machine inactivity limit" to "900" seconds" or less, excluding "0" which is effectively disabled.