That IS strange, because I have NetBIOS totally disabled. As for port 135, you can try this: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole Look on the right-hand panel for a value named EnableDCOM. By default it should be set at Y, change this to N. This will disable DCOM. Next, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc Look on the right-hand panel for a value named DCOM Protocols. Do not modify the entire value, but instead only remove ncacn_ip_tcp from the DCOM Protocols value, and leave everything else untouched.