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Error: RPC Requires Authentication 

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An RPC security policy has been enabled, which is blocking DCOM communications needed for remote debugging.

To correct this error

  1. Run \windir\system32\regedt32.exe

  2. Locate and delete HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\RPC\RestrictRemoteClients.

  3. Restart your machine so the registry change will take effect.

  4. If the problem persists, contact your domain administrator about the "Computer Configuration->Administrative Templates->System->Remote Procedure Call->Restrictions for Unauthenticated RPC clients" group policy setting.