diff --git a/windows/security/threat-protection/windows-defender-application-guard/faq-wd-app-guard.md b/windows/security/threat-protection/windows-defender-application-guard/faq-wd-app-guard.md
index 1e8839b354..6fc40a60b0 100644
--- a/windows/security/threat-protection/windows-defender-application-guard/faq-wd-app-guard.md
+++ b/windows/security/threat-protection/windows-defender-application-guard/faq-wd-app-guard.md
@@ -92,3 +92,7 @@ Yes, both the Enterprise Resource domains hosted in the cloud and the Domains ca
 ### Why does my encryption driver break Windows Defender Application Guard?
 
 Windows Defender Application Guard accesses files from a VHD mounted on the host that needs to be written during setup. If an encryption driver prevents a VHD from being mounted or from being written to, WDAG will not work and result in an error message ("0x80070013 ERROR_WRITE_PROTECT"). 
+
+### Why did Application Guard stop working after I turned on hyperthreading?
+
+If hyperthreading is disabled (either with KB or through BIOS), there may be a possibility Application Guard will no longer meet the minimum requirements.