Hi guys. I know it is an old thread. But the problem is still there and I still haven't found any solution for it. So here is a workaround:
If not explicitly disabled, biometry works with all user accounts except of the built-in administrator account. Create another user account withh administrator privilegies to use biometric logon with it. If you need the user name "administrator" you can rename the built-in administrator account by using "security options" (secpol.msc) and then create an new administrator account called "administrator".
good luck