For the total control of your LAN and other networks, you should trust Network Controller. The controller can be installed by anyone and does not occupy lots of computer resources. This is a very reliable application that comes with an user friendly interface.
Network Controller will display your entire network and all connected devices. Once the network is displayed, you will have the chance to unable/disable it. Moreover, the connection status of the network will be shown. For wireless connections, the same functionality is offered.
Essentially, Network Controller is a shortcut for controlling your network. This is the case because your system comes with a network control tool. However, that tool is hard to reach at times and not so easy to understand for beginners. You should definitely give Network Controller a try.