We are having the same issue. My little one uses this for remote school and comes to me crying a few times a week when we have issues and she has to leave class. I have tried a few fixes with drivers and they don't last. We need a solution. This is not the application if it works for any other PC. We have a super cheap, old Acer laptop that has NO issues.
HP, get an update out ASAP. Kids NEED to be remote and your product is broken.
Try loading the LATEST Graphics drivers and software from AMD Radeon. That worked for me. The problems seems to be with the graphics drivers that HP gives us. The microphone is actually controlled by the graphics driver.
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