Hi folks. Any suggestions on how to stop Windows from auto adjusting volume? I just purchased and started using the Audio Technica Pro 8HEMW / Andrea PureAudio USB_MA combo. DPI 15.3 on Windows 10 boot camp on a 2017 MacBook Pro. 

On a fresh restart, I open up sound preferences, select properties for this mic, and set the level to 90. But as soon as I start Dragon, it drops to 70 and adjusts up and down as it sees fit. Also happens if I turn off Dragon and launch a video conference. It's driving me crazy!

I already tried all the suggestions on this page. Any help is appreciated.

Dragon is the culprit; not Windows. You really don't want Windows adjusting your microphone input levels because Dragon has to handle this chore to make it work well with dictation. Unfortunately, this is your problem. You could automate this task with a macro. This is 1 of Dragon's most powerful non-dictation features. If you're not using KnowBrainer 2017 feel free to copy the following command into Dragon as an Advanced-Scripting command. Our command name is Volume Level <1to100> but note that you will also have to add a 1 to 100 list into Dragon. Other options include using 2 dedicated sound systems adjusting the volume level from within your video app or just using KnowBrainer

Sub Main
AppBringUp "C:\Windows\System32\SndVol.exe"
Wait 1
SendKeys "{End}"
Wait 1
SendKeys"{Up "+ListVar1+"}"
Wait 1
SendKeys "{Esc}"
End Sub

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Thank you for the reply! I just loaded up KnowBrainer to test it out. The command "Volume Level 90" raises the speaker volume, but is there a command to set and lock the mic input level?

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2 ways I know of:

1. https://www.tenforums.com/tutorials/77458-rundll32-commands-list-windows-10-a.html

Use Dragon to run:

"Rundll32.exe shell32.dll,Control_RunDLL Mmsys.cpl,,1"

Above takes you straight to the classic Sound --> Recording tab.  From there use Dragon/KB to navigate up and down to select the microphone you want to control (in our evil days of the Corona and remote up-the-yin-yang most folks have several mics attached to their rig, as I do).  Use Dragon to double-click the Mic of your choice.  Click/Select "Levels".  Then use Dragon/KB to drive the left or right arrow to move the gain slider.  Not being a KB user, I am nevertheless 100% certain KB can automate that for you in style.  

2. Download AutoHotKey.  Run Soundcard Analysis script once (or every time you add/remove a mic), to find out the device number of the sound device you want to control.

Let's say the device number corresponding to the mic of your interest is 6, which you can easily find out by manually setting the mic gain to any odd number (say 39) and run the Soudcard Analysis script above to see which device number has "39" beside it.   

Then it is easy as pie (and if you find anything peasier let me know): 

SoundSet,100,,,6

You can bind above to a hotkey or call it with ShellExecutethisandthat from Dragon, which has been liberally mentioned umpteen times a day around here.

To "lock" the gain in place, you can run "SoundGet" every so often against the device number.  If it is not 100, set it to 100.

P.S., there must be 25 other ways to approach this on Windows, from PowerShell, VBS, etc. etc.  But simpler than AHK without installing something proprietary?  Likely bar none.

Non-pro tip from me: so long as you are tethered to this sorry platform called Windows: your choice of mitigation depends on where you wish to go:

Go sexy, go Python.

Go pro, go .NET (C#, VB, etc.)

Go home (as in wanting to accomplish what you need to get done and head home), get a shot of AutoHotKey.