Autodata 3.45 is a legacy version of the popular automotive diagnostic and technical information software, widely used by mechanics for vehicle specifications, repair times, wiring diagrams, and fault code data. This version (circa 2010–2012) relied on hardware-based copy protection using a Sentinel USB hardware key (dongle). Without the key physically inserted and correctly recognized, the software refuses to run, presenting error E0209.
How to Fix "E0209 Sentinel Key Not Found" in Autodata 3.45 (Windows 7) E0209 Sentinel Key Not Found Autodata 3.45 Windows 7
Run as Administrator
Plug the Autodata USB key into a different Windows 7 machine (or even Windows 10). If the same error appears, the dongle itself might be dead. Unfortunately, Autodata no longer supports version 3.45, so you would need to replace the hardware key or upgrade the software. Understanding the Error: E0209 Sentinel Key Not Found
Run the Install_x64 (or x86) script as Administrator from your installation folder . Test the Dongle on Another PC Plug the