I am running Win7 Ultimate on a Dell XPS 13 Ultrabook. I checked the Network and Sharing Center - nothing. I looked in Device Manager and it showed up as Other Devices… Unknown Device. I tried Update Driver Software and pointed to the driver folder but Windows said it’s unable to install the driver. I deleted the unknown device, restarted my computer and tried again with the same results.
This is very frustrating because the $6 USB to ethernet device I got from eBay worked fine (until I bumped it and broke it). I bought the plugable device because it looks more versatile and durable.