Tethering firewall for Windows (7) to reduce tethering traffic

Last week I was on holidays on a beatiful Island. We had a great time and it was just relaxed.

Everything was fine and a nice fact was, that there was NO WLAN in our apartment. So I had to SWITCH OFF, which is a good thing for me.
Anyway there were some situations where I had some ideas I wanted to write down to my blog. So I had two options: