Security Device Not Found Please Attach Your Dongle And Restart The Software Upd [2026]

Security Device Not Found: A Comprehensive Guide to Resolving the "Please Attach Your Dongle and Restart the Software" Error

On macOS: allow kernel extensions or approve in Security & Privacy if prompted.
On Windows: ensure no security policy blocks USB devices.

Close the updater completely.
Launch it again after the dongle is firmly inserted.

The error message "Security device not found: Please attach your dongle and restart the software" typically occurs when specialized software is unable to communicate with a physical USB license key (dongle) required for operation. This issue is common in industries using high-end engineering, design, or embroidery software, such as Wilcom, Melco, or EFI Fiery. Common Causes Security device not found - Wilcom International Security Device Not Found: A Comprehensive Guide to

Open Control Panel > Hardware and Sound > Power Options.
Click Change plan settings next to your active plan.
Click Change advanced power settings.
Scroll to USB settings > USB selective suspend setting.
Set it to Disabled.
Click Apply > OK. Restart your PC.

Update Software and Drivers:

Invest in a reliable, high-quality dongle from a reputable manufacturer.

Avoid physical damage to the dongle.
Store the dongle safely when not in use.

Conclusion