The Network access: Let Everyone permissions apply to anonymous users setting should be configured correctly. This policy setting determines what additional permissions are assigned for anonymous connections to the computer. If you enable this policy setting, anonymous Windows users are allowed to perform certain activities, such as enumerate the names of domain accounts and network shares. An unauthorized user could anonymously list account names and shared resources and use the information to guess passwords or perform social engineering attacks. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Network access: Let Everyone permissions apply to anonymous users (2) KEY: HKLM\System\CurrentControlSet\Control\Lsa\EveryoneIncludesAnonymous