Audio feedback loop - where to begin

chiropterist

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Local time
5:02 PM
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5
On my HP 250 G3 notebook PC, I somehow messed up the audio settings so that I now get audio feedback between the microphone and the speakers. This becomes deafening when using certain apps, like Google Meet.

Playback by itself works fine, but I can't use the built-in microphone at all. I have tried different settings and audio levels, but nothing works. I don't know where to start to troubleshoot this. I am running Windows 7 Service Pack 1, build 7601. My computer has a Realtek High Definition Audio driver version 6.0.1.7164, installed 1/24/2014 and something called DTS control panel installed on 5/30/2015. See my computer specs for more info.

I have uploaded a screenshot of the I am loathe to make any more changes or update anything until I understand what I am doing. Please help.
 

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    HP 250 G3 Notebook
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    Windows 7 Pro 64bit SP1
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    Motherboard
    HP Base Board 2211, v86.57
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Have you accidently checked 'listen to this device' ?

Screenshot 2021-11-03 161323.png
 

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Computer type
PC/Desktop
Computer Manufacturer/Model Number
self build
OS
Windows 7 Pro x64 sp1
CPU
i7 4770K
Motherboard
MSI B85M-E45
Memory
8GB Corsair Vengeance 1600MHz
Graphics Card(s)
onboard
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LG 27MP35
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1920-1080
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Seagate 2TB
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Cooler Master GX 750
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Antec 300
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Seidon 120V
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60/18
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MSE
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