How to Scan QR Codes Using the Windows Camera App Want to scan a QR code using your PC's webcam, just like you would with your phone? The built-in Camera app on your Windows 10 or 11 PC makes it easy.

Use the Microsoft Authenticator app to scan the QR code or manually input the key. The app will give you a code to enter. Go back into Facebook and input the code.

You can use Microsoft Authenticator on multiple devices by scanning the same QR code during setup. When the QR code is displayed, scan it on both phones to ensure they generate identical codes.

Not using the QR code scan feature — and manually entering the code — will also sidestep the issue, which doesn’t appear to arise when the authenticated accounts belong to Microsoft.