Download the Hardware Lock Driver from here.
Extract the files from Sentinel_Protection_Installer_7.6.9.zip
Run Sentinel Protection Installer 7.6.9.exe
The Troubleshooting Guide for Sentinel Hardware Keys provides in-depth troubleshooting of Sentinel System Drivers along with troubleshooting both Parallel and USB Sentinel keys. Download the Guide from here.
Download the Sentinel Advanced Medic from here.
Special Instructions if you have a Parallel Hardware Lock
After launching Sentinel Protection Installer 7.6.9.exe, follow the steps in this screencast.
Keywords: Hardware Lock Driver, Sentinel Driver, Dongle Driver, Parallel Port, Printer Port.