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I don't have a web cam or a scanner. After some hunting around I have found the list of "Non-Plug and Play" (surely there should be more hyphens in that) devices, of which there are apparently 43. The first two both have Microsoft drivers installed. Inspecting the remaining 41 would take a lot of time. Have you any hints as to which to search with priority?
I am afraid I did not take note when the windows first appeared, but definitely less than a fortnight ago.