In my Network Preferences panel, I've just noticed a network type I didn't see before.
The name is "Ethernet Adaptor (wc5)" (note it says Adaptor and not Adapter). It has an IP, it's yellow, and it says "Ethernet Adaptor (wc5) has a self-assigned IP address and will not be able to connect to the Internet."
What is it? Where does it come from? I am connected via WiFi - and, probably not a coincidence, I have internet issues right now (some sites work some don't).
What is happening?
EDIT: Disabled this network adapter, and now Internet flies. I don't know what it is and how it got there...