To resolve the error, the following systematic troubleshooting steps are recommended, ordered from least to most invasive.
Modern operating systems employ various power management features that can inadvertently interfere with USB devices. The "USB selective suspend" setting, for example, allows the system to cut power to idle USB ports—which can prevent a dongle from being detected when the software starts up.
Plug the dongle into a completely different computer. If the computer acknowledges new hardware being inserted (even if the software isn't installed), the dongle itself is functional. If it remains completely dead on multiple machines, the hardware key may be physically damaged and require a vendor replacement. 2. Restart and Verify the License Services Plug the dongle into a completely different computer
If you've exhausted all troubleshooting and the dongle isn't recognized on multiple computers, it may have failed. Here's what to do:
Local licensing systems often use specific network ports to communicate locally (for example, Sentinel HASP uses port 1947). Ensure your local software firewall is not blocking internal loopback traffic on these ports. 5. Address Virtual Machines and Remote Desktop (RDP) Your dongle may be physically fine
The most straightforward cause is also the most commonly overlooked: the dongle is simply not plugged in. However, even when physically connected, problems can persist. A loose connection can prevent the dongle from being detected. Similarly, a specific USB port may have become defective, or the dongle itself may have suffered physical damage.
A simple reboot can resolve locked drivers or stuck USB services. Phase 2: Driver Issues and Troubleshooting even when physically connected
If it fails on a second computer, the dongle is likely broken. Contact the software manufacturer to request a replacement.
Your dongle may be physically fine, but the license stored on it could be corrupted or expired. Use the vendor’s license management tool to:
