I suspect that the Parallels Host-Guest Adapter is somehow interfering with my Airport connection. In Network status, it says that it is connected to my network, but doesn't have an IP address and can't connect to the Internet. I have noticed that the Parallels Host-Guest Adapter is running even when Parallels is not, and even remains after a reboot. How can I remove it to see whether it is the culprit for my airport connection not working?