If you try to register fingerprint for Windows Hello Setup using Sign-in Options page, Windows 10 shows the following error message:
This error prompt when Windows 10 finds that the fingerprints are already registered with a different user account and now the user is trying to register the same fingerprints again for a new user account. Follow below solution steps to resolve the issue by removing the system file containing fingerprints data then perform fingerprint scan again.
That fingerprint has already been set up on another account. Try a different finger.
Step 1: Press Windows + R keys together to open the Run dialogue box.
Step 2: Type
services.msc and press Enter key to open the Service Manager.
Step 3: Locate the Windows Biometric Service.
Step 4: Right-click on Windows Biometric Service and select Stop option from the context menu.
Step 5: Go to the following folder path:
Step 6: Delete all files present in this folder.
Step 7: Go back to Service Manager, right-click on Windows Biometric Service and select Start option to start the service.