We tried reaching you on a private message asking for the Service Tag number to ascertain the warranty but did not receive a response. Please feel free to reply to the private message whenever you are available.

I had been replying to your E-Mails, but just did reply to your Private Message.

Regardless, that Laptop is no longer in warranty.

I have a similar problem. Dell support wants me to reinstall Windows. Not much help otherwise. My fingerprint login will work for a time or two if I reload the driver, but then it won't work. Uninstalling and letting Goodix driver works temporarily too. I think it's a Windows Hello problem that Dell support isn't going to be able to help with. 

THANKS for the info