How to Fix the "Security device not found, please attach your dongle and restart the software" Error
Action Required: Security Dongle Missing
drivers. If you recently updated your OS, the old driver might be blocked. You can often download the latest Sentinel LDK Run-time to fix communication issues. Check Windows Services services.msc , and hit Enter. Sentinel LDK License Manager HASP Loader How to Fix the "Security device not found,
– If the automatic updater continues to fail, download the update package directly from the vendor's website and install it manually. You'll still need the dongle attached, but you bypass the updater's detection routine.
Dongle drivers rely on continuous background services to validate the license while the software runs. If a Windows optimization tool or update disabled these services, the validation will fail. Press Windows Key + R , type services.msc , and hit Enter. Check Windows Services services
Ensure that you are using the correct dongle for your specific software version:
Scroll through the alphabetical list to locate the service tied to your key. Look for names like: HASP Loader CodeMeter Runtime Server Dongle drivers rely on continuous background services to
The legitimate solution to dongle-related errors is always to work through official support channels:
To resolve the "Security device not found" error, follow these step-by-step troubleshooting procedures: