Windows 10 and 11 updates (especially after 2020) have become stricter about unsigned drivers. The older Sentinel drivers used by many Autodata versions do not have a valid Microsoft digital signature. Windows blocks them silently, making the key invisible.
If drivers and power management fail, the license ID stored in Windows Registry may be corrupted. autodata sentinel key not found e0209 work
autodata installation instructions - Microsoft Software - Scribd Windows 10 and 11 updates (especially after 2020)
To help me give you more precise instructions, are you using a or a virtual/emulator version of Autodata? Autodata Runtime error 217 at 004bb10d Windows 10/7/8/XP autodata sentinel key not found e0209 work