I am a pretty happy user of Acer S5-371 laptop.
I almost gave up on Fingerprint sensor after I installed the Windows Update 1803.
I have done all recommended troubleshooting (reboot, reinstall driver, enabled biometrics in Windows and BIOS...).
Then I decided to roll back the update and fingeprint sensor started working.
The problem is that Windows will at some point "decide" to install the update again by itself. And then the whole story will repeat.
Solution:
Can ACER somehow provide a new driver for fingerprint sensor?
The latest driver on support website is:
https://global-download.acer.com/GDFiles/Driver/Fingerprint/Fingerprint_ELANTECH_1.6.3.1_W10x64_A.zip?acerid=636196276687979125&Step1=ULTRA-THIN&Step2=ASPIRE&Step3=ASPIRE S5-371&OS=ALL&LC=en&BC=ACER&SC=PA_6