If WMI is not working on a Windows host, verify a couple of things:
Computer Configuration -> Administrative Templates -> Network -> Network Connections -> Windows Firewall -> [Domain|Standard] Profile Windows Firewall: Allow remote administration exception (allow from the IP where you are scanning and enable it) Should fix the firewall woes. Security Settings –> Local Policies –> Security Options Network Access: Sharing and Security Model for local accounts (set it to Classic auth). (Try turning off simple sharing on the host as well). The reg key for simple file sharing is here: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\ForceGuest 1 = simple fs enabled, 0 = sfs disabled Check the Windows firewall as well for exceptions.