I recently bought a refurbished HP ProBook 430 G2 in Japan. It feels new and I'm very happy with it.
I believe this model was originally sold with Windows 8 or 8.1 but it had a fresh install of Windows 10 on it when I bought it.
The laptop seems to have a fingerprint scanner below the keyboard, to the right of trackpad.
It doesn't seem to do anything. I can't find it listed in Device Manager. I can find lots of people asking similar questions on various forums but without adequate answers.
I have updated Windows 10 and updated all drivers from the HP website. I have specifically downloaded and run every version of the fingerprint scanner from HP's site that have links posted in the answers in the forums I found on this topic.
Under Sign-in Options / Windows Hello Fingerprint it says "This option is currently unavailable - click to learn more". Clicking does not lead to any solutions though.
My best theory is that Windows Hello is new and requires a specific kind of fingerprint scanner driver that is either not compatible with the sensor hardware on this laptop, or which has not had a Hello-compatible driver released for some reason.
My second theory is that perhaps my laptop has a "blank" where the fingerprint sensor would be and that it was optional and my laptop never had one but I just don't know what it should look like (-: