Install the driver and restart your computer before launching the software. 4. Check for Antivirus Interference
Let me know, and I’ll format it so you can copy-paste and print it on paper.
The error “Security device not found. Please attach your dongle and restart the software” is a rite of passage for anyone using professional protected software. But it’s almost always solvable.
Most dongle-protected software installs a runtime environment automatically. But updates or antivirus scans can break it.
Sometimes the background service that "listens" for the dongle hangs. A full system reboot often restarts these services automatically. 2. Update or Reinstall Drivers
When you see “Security device not found…” it means the software requested a valid cryptographic response from the dongle, but either:
When you RDP into a machine, the local USB dongle does not automatically redirect. You need:
USB ports, especially on laptops and front-panel desktop connectors, are prone to failure or power fluctuations.
Most importantly, treat your dongle like the critical asset it is. Use an extension cable, keep backups, and stay on top of driver updates. With these practices, that dreaded popup will become a rare nuisance rather than a productivity killer.
Look for services like or "WIBU-KEY Server."
The error message explicitly says "restart the software," but sometimes that isn't enough. The dongle driver often loads when the computer boots.