The driver fails after suspend or hibernation on every machine I own.
The IP information window and the output of ipconfig are empty.
On Win 7, de-installing and reinstalling the device (hence fully restarting the driver) fixes it.
On windows 8, a right click on the connection and "Diagnosis" does the same (if the user has admin rights).
Please fix this. It seems like the driver doesn't properly detect the suspend/wake-up and some things are not properly initialized.