Do you want to step away from the Internet for a while ?
If you disable or enable the Network Adapter manually, the steps would be
Control Panel -> Network and Internet -> View Network Status -> Change Adapter Settings.
The disable-enable-internet script will make your life easier. To give this a try,
1. Download disable-enable-internet batch file [Developed by Digital Inspiration].
2. Place it on your computer Desktop
3. If you want to disable internet connection, just click on disable-enable-internet shortcut. Later, when you need to reconnect, just right-click the same file.