What Does This Do?
This utility installs the UPEK TouchStrip FingerPrint Sensor (WBF advanced mode) driver.
This driver also resolves the yellow exclamation point error that may appear in Device Manager as "Fingerprint Sensor" which indicates that a driver is not installed for that device.

To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
Download the UPDFPD-00203593-764.EXE file to a temporary or download directory (please note this directory for reference).
Go to the directory where the file was downloaded and double-click the UPDFPD-00203593-764.EXE file to begin the installation.
At the "User Account Control" screen, click "Yes".
At the "TouchStrip Fingerprint Sensor (WBF advanced mode)" screen, click "Next".
At the "License Agreement" dialog, read the agreement, then, if you agree, click "I Agree" to continue with the installation.
At the "Finish" screen, click "Finish".
The installation of the UPEK® TouchStrip® FingerPrint Sensor (WBF advanced mode) Driver is complete.

This utility installs the UPEK TouchStrip FingerPrint Sensor (WBF advanced mode) driver.
This driver also resolves the yellow exclamation point error that may appear in Device Manager as "Fingerprint Sensor" which indicates that a driver is not installed for that device.

http://esupport.sony.com/US/p/swu-matrix.pl?upd_id=4842