Good day! I'm Raniel, an Independent Advisor and a Microsoft user like you.
Kindly try to perform the steps on this article and see if it fixes the issue: https://windows101tricks.com/webcam-freezes-win...
Have you also tried to login using MS Teams web app https://go.microsoft.com/fwlink/p/?LinkID=87302... to further isolate the issue?
I also suggest to uninstall the desktop app via control panel, delete the files under %appdata%\Microsoft\teams\Cache and %appdata%\Microsoft\teams\Application Cache\Cache, perform a reboot and try to install the latest version via
https://www.microsoft.com/en/microsoft-365/micr...
You may also run the SFC and DISM command as well to repair system files
- On the search bar, type "command prompt" and select Run as administrator
- Type the following commands in order
sfc /scannow then press Enter
Dism.exe /online /cleanup-image /CheckHealth then press Enter
Dism.exe /online /cleanup-image /ScanHealth then press Enter
Dism.exe /online /cleanup-image /RestoreHealth then press Enter
rundll32.exe pnpclean.dll,RunDLL_PnpClean /DRIVERS /MAXCLEAN then press Enter
- Perform a reboot once done and check again.
I hope this helps.
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The fix is to roll back Teams to a previous version rather than this generic trouble shooting guide.