Thanks to Josh5 and to xbalanke.
Your outline pointed me in the right direction.
I have a HP Probook 4540s which, like your computer, has a VFS491 fingerprint scanner.
For me installing the Lenovo and Dell drivers that are mentioned didn't work. They wouldn't appear in the drivers list, even when I unticked "show compatible hardware".
What worked for me in the end was:
- Followed xbalanke's steps through to untick "show compatitible hardware".
- I then selected the driver called "Validity Sensor (VFS495)". This is still the standard Microsoft driver, but for the VFS495 scanner.
- I then had to install HP ProtectTools Security Manager (for Windows 8.1).
- Then rebooted.
- And it worked. I now have fingerprint scanning to sign on. What is weird is that "Windows Hello" still does NOT show in the settings sign on options. So I use HP Client Security app (part of HP ProtectTools Security Manager) to load and manage fingerprints.
I totally agree - it's very annoying that HP hasn't yet released updated drivers for the fingerprint scanner (VFS291) that are compatible with Windows Hello.
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This worked perfectly using both posts starting with xbalanke and then Josh5.