How to recover all the sign in features after upgrading

We just repaired my Windows 10 system here from various virus problems and system corruptions
and upgraded to windows 10 Pro However my sign in features do not all work my finger scan to sign in is gone
How to I go in to set it back up Thanks again mates for all the help Will be visiting the PayPal link one a week or month to donate
A fantastic forum this is for sure Shot out to Compton, Rec Device and Smirk for Tech Help great guys and funny also