Register Hereor login if you are already a member
Select the Start button, then click Settings > Accounts. Click Sign-in options on the left. Scroll to Windows Hello & click Set Up in the Fingerprint section. (Before doing this, it is needed to create/add one PIN, else it may be shown greyed). Next Click Get started. Enter the PIN. Next scan your finger on the fingerprint reader. You will have to do this multiple times to give the scanner a good picture of your prints.