Don't know much about these things, my web cam is a plug in so I have to make sure that the PC doesn't default to a previously installed web cam. That caught me out one time.
What about checking settings - could you have disabled the web cam?
I do hope you get it sorted - perhaps it is already sorted.
AIBU To Be So Annoyed at the Stupidity of This
Father's Day Sunday — nobody makes cards for this type of dad
