Sentinel Key Not Found -

This is the most common fix. Manufacturers frequently update drivers to keep up with Windows 10 and 11 updates.

if physical_check: # Key is plugged in but software can't see it action = UI.show_dialog( msg="Key detected but drivers are unresponsive.", options=["Restart Service", "Ignore"] ) if action == "Restart Service": ServiceManager.restart("SentinelKeysServer") return self.validate_startup() # Retry else: # Key is not plugged in at all UI.show_dialog( msg="Please insert the Sentinel Key into a USB port.", options=["Retry", "Exit"] ) return False sentinel key not found

Firewalls or antivirus software are blocking the license check. This is the most common fix

Go to the official or your software provider’s support page. sentinel key not found