diff --git a/windows/hub/breadcrumb/toc.yml b/windows/hub/breadcrumb/toc.yml
index 8089687a77..1a0289c119 100644
--- a/windows/hub/breadcrumb/toc.yml
+++ b/windows/hub/breadcrumb/toc.yml
@@ -37,21 +37,31 @@ items:
             tocHref: /windows/security/
             topicHref: /windows/security/
             items:
+              - name: Hardware security
+                tocHref: /windows/security/hardware-security/
+                topicHref: /windows/security/hardware-security/
+              - name: Operating system security
+                tocHref: /windows/security/os-security/
+                topicHref: /windows/security/os-security/
               - name: Identity protection
                 tocHref: /windows/security/identity-protection/
                 topicHref: /windows/security/identity-protection/
+              - name: Application security
+                tocHref: /windows/security/application-security/
+                topicHref: /windows/security/application-security/
+                items:
+                  - name: Application Control for Windows
+                    tocHref: /windows/security/application-security/application-control/windows-defender-application-control/
+                    topicHref: /windows/security/application-security/application-control/windows-defender-application-control/
+                  - name: Microsoft Defender Application Guard
+                    tocHref: /windows/security/application-security/application-isolation/microsoft-defender-application-guard/
+                    topicHref: /windows/security/application-security/application-isolation/microsoft-defender-application-guard/md-app-guard-overview
+              - name: Security foundations
+                tocHref: /windows/security/security-foundations/
+                topicHref: /windows/security/security-foundations/
               - name: Security auditing
                 tocHref: /windows/security/threat-protection/auditing/
                 topicHref: /windows/security/threat-protection/auditing/security-auditing-overview
-              - name: Microsoft Defender Application Guard
-                tocHref: /windows/security/application-security/application-isolation/microsoft-defender-application-guard/
-                topicHref: /windows/security/application-security/application-isolation/microsoft-defender-application-guard/md-app-guard-overview
               - name: Security policy settings
                 tocHref: /windows/security/threat-protection/security-policy-settings/
-                topicHref: /windows/security/threat-protection/security-policy-settings/security-policy-settings
-              - name: Application Control for Windows
-                tocHref: /windows/security/application-security/application-control/windows-defender-application-control/
-                topicHref: /windows/security/application-security/application-control/windows-defender-application-control/
-              - name: Operating system security
-                tocHref: /windows/security/operating-system-security/
-                topicHref: /windows/security/operating-system-security/
\ No newline at end of file
+                topicHref: /windows/security/threat-protection/security-policy-settings/security-policy-settings
\ No newline at end of file