A built-in fingerprint reader turns a laptop's power button or touchpad corner into a one-touch sign-in, and Windows Hello handles the rest without a password ever leaving the machine. The convenience is obvious after a day; the real value sits in how the credential is stored.

Modern sensors keep the fingerprint template inside a hardware-protected area rather than in a file, and bind it to the system's TPM. That same Windows Hello identity now unlocks passkeys across supported browsers and apps, so the reader does far more than open the lock screen.