As a temporary fix until this is resolved, there is a way you can re-enable your internet connection without restarting the computer, which might help you.
You should have an icon in your task bar in the bottom right for your wireless internet signal. You should be able to right click on that, and choose to Enable the wireless adapter again (assuming it has been Disabled).
If this option is not present, you should be able to open My Computer / My Documents, and somewhere on the left should be a quick link to View Network Connections. From there you will be able to right click on your Wireless Adapter, and choose to Enable it again.