Hi, I'm using a Vostro 5470 and after Windows 1803 update, microphone stop working.
I have audio (and if I boot on Linux, the microphone is also working, showing it is a driver issue). Skype, Slack and Zoom worked until last week and now the mic does not.
I've tested 3 Realtek High Definition Audio drivers: 22.214.171.12409 (the last available at Dell drivers page) and the last two we can get in internet up to 126.96.36.19972 of February 8th, 2018).
If I use a headset, I can listen but mic is not working either.
What can I do?
Wow, this one was really fast. I've found the solution:
Microphone not detected anymore? Sound settings or features not working? Check Settings > Privacy Microphone and test if "Let apps use my microphone" resolves the issue.
Control Panel > All Control Panel Items > Deice Manager
A list should pop up
Right Click > "Audio input and outputs" > "Scab for changes"
If that does not work update driver by right clicking and selecting
Right Click on the "Volume Speaker Icon" on the taskbar
Select>"Troubleshoot sound problems"
Select the applicable item and look through its properties to see what you may or may not need to check/uncheck.
My headphones / external speaker wern't recognised. In device manger I just uninstalled all the audio related drivers and checking the 'uninstall software' box as well. I just restarted and fixes it. Don't bother with that WAVE **bleep**e software.