Ensure you are running an Autodata version that is officially supported on Windows 10 (such as Autodata 3.45 or later). Older legacy versions struggle immensely with modern OS security protocols.

Scroll down to and click Add or remove exclusions . Click Add an exclusion and select Folder . Browse to and exclude the following paths: C:\Program Files (x86)\Common Files\Aladdin Shared\

How to Fix the "Autodata Sentinel Key Not Found" Error on Windows 10

Hold the key down while clicking Restart in your Windows Start Menu.

The Sentinel Protection Server must be active for the key to be recognized.