E6440 fingerprint reader, "windows hello" issue

I have a basically brand new Latitude E6440 that I recently applied the W10 upgrade to, which disables the ability to login to windows via the fingerprint reader and contactless smartcard using Dells Security Tools. I understand the login authentication is now handled by "Windows Hello".

After setting a PIN in Sign-in options and enrolling fingerprints in "Windows Hello", I am still unable to login using the fingerprint reader - no option for this appears at the login screen despite "Windows Hello" apparently being correctly setup.  I have updated all of the drivers & Dell Security tools. Dell has advised me that they will not assist with this without additional payment.  Has anyone encountered this issue, and does anyone know if the ability to login with a smartcard will be restored under Windows 10? 

Thanks.