The driver relies on a background Windows service to listen for authentication requests from Autodata. If this service is stopped, the key will not be found. Press Windows Key + R to open the Run dialog box. Type services.msc and press .
The original Sentinel driver for AutoData is often 32-bit only. On 64-bit Windows 10, the driver runs in a compatibility layer (WOW64), leading to intermittent timeouts. The key may work for hours, then vanish mid-diagnostic session. autodata sentinel key not found windows 10