The camera on Windows 11/10 usually works by default, but if your integrated Camera or Webcam is not working in Windows 11/10, then this troubleshooting guide will help you resolve the issue.
The stream will start on your PC. Open the camera app to view the viewfinder. Note that the view on your screen will have the app's watermark on the free version. It didn't affect my experience ...
Once your camera turns on, place your QR code in front of your computer's camera. Once it's identified, you'll be able to open or save it. How to scan a QR code on a Windows PC For PCs ...