The E0209 error implies that the software is looking for the Sentinel security key but cannot locate it. Common causes include:

—was staring back at him with a cold, digital wall of text: "Sentinel Key Not Found (E0209)."

Right-click the service again, select , and change the "Startup type" to Automatic . Click Apply and OK . Step 3: Reinstall the Sentinel Runtime Drivers

Disable through the Windows Control Panel and turn off your antivirus program temporarily.

Alternative Solution: VirtualBox Pre-Configured Environments

Follow these steps in exact sequential order to resolve the error. Missing a reboot or an administrator privilege step can prevent the fix from working. 1. Disable Windows Driver Signature Enforcement

| Step | Action | Expected Result | |------|--------|------------------| | 1 | Restart PC, use rear USB 2.0 port | LED on dongle lights | | 2 | Download latest Sentinel HASP Run-time from Thales | Get HASPUserSetup.exe | | 3 | Uninstall old drivers via Device Manager (with deletion) | Clear corrupted entries | | 4 | Disable USB selective suspend in Power Options | Prevents power loss | | 5 | Install fresh driver (Run as Admin), then restart | Driver layer rebuilt | | 6 | Plug in dongle, launch AutoData | Error E0209 resolved |