If the dongle has no internal light, the USB port may not be providing power. Try a different port.

| Step | Action | |------|--------| | 1 | – Unplug and reinsert the black dongle into a different USB port (preferably directly on the computer, not a hub). | | 2 | Look for LED light – Most black Embroidery Studio dongles have a small LED that lights up when plugged in. If no light, try another computer to test if the dongle is dead. | | 3 | Restart the software – Close the embroidery program completely and reopen it. | | 4 | Restart the computer – This resets USB drivers and can resolve detection issues. | | 5 | Reinstall dongle drivers – Go to the software’s installation folder or the manufacturer’s website (e.g., Wilcom) and run the Sentinel/HASP driver installer . |

However, remember that hardware keys are physical objects. They can be lost, stolen, or fried. If you run a commercial embroidery shop, consider discussing "Zero-Footprint" licensing or cloud backup options with your software provider. While the black dongle is a reliable tank, even tanks eventually need maintenance.

If this message appears when you try to open the software, it means the security device is not detected. :