rgd1101 :
read the tutorial
http

/www.tomshardware.com/faq/id-3705723/fix-microphone-webcam-quit-working-windows-1803-update.html
My privacy settings are already set to allow the microphone. My issue is that, as soon as the update was applied, my G430 headset's microphone won't pick up any sound unless I talk very loudly - even though the volume and boost are both at max in settings.
If the privacy settings were responsible, it wouldn't pick up anything at all.
This happens any time I am using the mic - testing in the settings menu, it will pick up (green bar) as soon as I start talking. In any VOIP setting (in-game, TeamSpeak, etc) it will only pick up if I start talking very, very loudly.
It was working fine last night before I applied the update.