I have upgraded my EB 8470p from Windows 7 to Windows 10. In order to perform upgrade I hvae had to unistall HP Client Security (used for many items but one of most usefull is log in to windows with fingerprint)
After upgrade my fingerprint reader became useless, since I could not set it up. There was no Windows Hello but there was driver showing up in Device Manager's tree.
Since I spend some time on this issue I want to share my finding with You, who ended up in the same situation.
So, here is what I have to do since I've used HP Client Security on Win 7, 8, 8.1 and now cannot use Fingerprint Log-In in Windows 10 after upgrade on HP Elitebook 8470p. This should wotk also on 8570p/w, 2570p and I belive on some other HP devices.
You remember that Windows 10 asked you to remove HP Client Security, and you did it, but you should remove also your data from it and Validity Fingerprint Sensor Driver. If you didn't do this completely, and you managed to update to Win10, find old installations, install it again (I mean HP Client Security and Validity Fingerprint sensor driver for OS that you have used previously) and than remove it in following order:
1. Uninstall Validity Fingerprint sensor driver from Device Manager in Win10 (if there is any)
2. Uninstall HP Client Security (I've used SP65637.EXE on my EB 8470p)