The Windows 11 system must use an antivirus program.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
high	V-253264	SRG-OS-000480-GPOS-00227	WN11-00-000045	SV-253264r991589_rule	2025-02-25	2

Description
Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software from the operating system.

ℹ️ Check
Verify an antivirus solution is installed on the system and in use. The antivirus solution may be bundled with an approved Endpoint Security Solution. Verify if Microsoft Defender Antivirus is in use or enabled: Open "PowerShell". Enter "get-service \| where {$_.DisplayName -Like "Defender"} \| Select Status,DisplayName" Verify third-party antivirus is in use or enabled: Open "PowerShell". Enter "get-service \| where {$_.DisplayName -Like "mcafee"} \| Select Status,DisplayName" Enter "get-service \| where {$_.DisplayName -Like "symantec"} \| Select Status,DisplayName" If there is no antivirus solution installed on the system, this is a finding.

ℹ️ Check

Verify an antivirus solution is installed on the system and in use. The antivirus solution may be bundled with an approved Endpoint Security Solution. Verify if Microsoft Defender Antivirus is in use or enabled: Open "PowerShell". Enter "get-service | where {$_.DisplayName -Like "*Defender*"} | Select Status,DisplayName" Verify third-party antivirus is in use or enabled: Open "PowerShell". Enter "get-service | where {$_.DisplayName -Like "*mcafee*"} | Select Status,DisplayName" Enter "get-service | where {$_.DisplayName -Like "*symantec*"} | Select Status,DisplayName" If there is no antivirus solution installed on the system, this is a finding.

✔️ Fix
Install Microsoft Defender Antivirus or a third-party antivirus solution.