This option is useful if you need to control whether this computer receives unicast responses to its outgoing multicast or broadcast messages. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Windows Firewall with Advanced Security\Windows Firewall with Advanced Security\Windows Firewall Properties\Public Profile!Windows Firewall: Public: Allow unicast response (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\WindowsFirewall\PublicProfile!DisableUnicastResponsesToMulticastBroadcast