I own a Lenovo M90Z system. It currently has an Intel Centrino N-1000 wireless card.
I just reinstalled Windows 7. I am getting the message. "Intel My WiFi technology. Hardware Radio switch off"
Can not log into the internet.
No switch on the machine.
Check if your laptop is one of the models that has a physical switch on the side that turns the radio off. In my experience, this switch can way too easily be accidentally knocked into the off position.
Hope this helps,