Just for the benefit of others finding this thread, this continues to happen and has happened for years, however it ONLY happens when I launch PokerStars poker app on my iMac. I open the app, get the login box, and the second i hit "login", my WiFi turns on. I then have to manually turn it off, which can cause problems with other programs I am running as they temporarily lose connection. I have told PokerStars about it several times but they stick firmly to the "it's OSX causing this" line, which is complete rubbish. I can run my machine for weeks without the wifi coming on, but the second I log in to Pokerstars, on comes the wifi like clockwork.