Final answer:
Windows Hello stores an encrypted representation of your biometric data, like facial geometry for face recognition and fingerprints for fingerprint recognition, securely on the local device. It doesn't store the actual biometric details like images.
Step-by-step explanation:
When configuring biometric authentication with Windows Hello, the system stores a representation of your biometric data. For facial recognition, this involves creating a facial geometry map using infrared (IR) imaging. For fingerprint recognition, it constructs a representation of your fingerprint patterns. Importantly, Windows Hello uses asymmetric encryption where the private key is stored locally on the device. The actual biometric details are stored on the device securely and are not shared with Microsoft or stored in the cloud. It's worth noting that what is stored isn't an image or a direct copy of the biometric data but rather an encrypted representation that can be used for verification purposes.