Windows 10: Windows 10 Camera "It looks like another app is using the camera already"

My camera suddenly stopped working when I was in a videocall on Microsoft Teams. It turned black and I couldn't start the camera anymore. I tried reinstalling the driver, both from the official Lenovo site (I have a Lenovo IdeaPad C340) and via Windows, that didn't work either. I already changed the privacy settings several times. Even if I turn off the camera by turning the camera access off, it still gives the same error which can't even happen. How can another app use the camera if I turned camera access off? I really need my laptop camera. Is there another way to actually fix this problem?

https://preview.redd.it/u0kp0ddeph9...bp&s=64d984be04e5a6c4af26ddc95bfb17f44339542b

submitted by /u/Rootel
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:)

 

Change the camera that the Windows 10 camera app uses.

Unintuitively, the icon in the upper left that looks like it's meant to switch between your front and back camera will also cycle through your other attached cameras. At least, this worked for me on a Surface Pro 4 (front and rear camera) with a USB Microsoft LifeCam attached. The Camera application's version is listed as 2018.227.30.1000.

 

Change the camera that the Windows 10 camera app uses.

From How to use the Camera app:

1. Open the Camera app.
   
2. Swipe in from the bottom edge to see the app commands.
   (If you're using a mouse, right-click within the app.)
   
3. Tap or click the Change camera button.
   

 

Dell camera driver

• To open up your webcam or camera, select the Start Windows logo Start button button, and then select Camera in the list of apps.
• If you want to use the camera within other apps, select the Start Windows logo Start button button, select Settings Gear-shaped Settings icon > Privacy > Camera, and then turn on Let apps use my camera. 
• From there, turn on each of the listed apps where you want to use the camera. Test your camera here

Webcam Test