If you suddenly find that Dragon does not recognise your microphone any more, even though Windows sees it, the below video might be the solution.
Apparently the latest large windows update (1803) changes something in the security settings of Windows. This video shows you how to check for the settings and make sure that your microphone isn’t blocked.
If you have any questions about how to use Dragon, remember that you can join the LearnSpeechRecognition Academy membership and get all the support you need! Reopening on 1 October 2018 for new paid members.