The last two days I've been having trouble browsing the internet. My browser kept trying to connect to a mysterious 0.1.0.5 host.

Well that's obviously rubbish but I eventually tracked it down to a mysterious 3rd NIC that I seemed to have acquired as part of a Video Capture card installation.

No problem I thought, I'll just disable it and everything will be fine. But oh no, I can't disable that device, maybe it's not plug and play, or maybe a different user started it. That's ridiculous.

Eventually I got round it by giving the device a stupidly high metric, but what on earth is the point of such a device in the first place.