[This is Part 1 of a two part problem. You can see the description and solution for the second issue which was no audio during and after the part 1 solution was completed. See Part 2 here.]
I ran into this issue a couple of weeks ago and eventually threw my hands up. Today, I came across the exact same symptoms on another computer so I decided to dig further in and find the cause. After successfully discovering the problem and applying the solution to the first problematic computer, I was able to fix the issue without reloading/refreshing the PCs.