I have a Dell Studio 1537 laptop with a 64-bit operating system. The wireless Internet no longer works for some reason. When I switch it on, it never is able to find any networks, even though on my college campus there is always access to networks. Whenever I click diagnose the probem, it only says that I should turn on the switch that activates the wireless network, but it's already on! This is highly problematic and frustrating. I have tried restarting the computer and that doesn't fix the problem, so I'm not sure what will.