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Close GDSLAB and confirm that the dongle is plugged into a USB port on the PC and its red light is turned on.

• If it is not, plug in the dongle and run GDLAB

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• If it is, then plug it into a different USB port

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Run GDSLAB, if the dongle is recognized and you no longer receive the error then the previous USB port it was connected to (or the internal HUB was faulty), or the driver installation was not finished and by connecting it to a different port Windows recognized the new device and finished installing its driver.

If the error message persists continue to the next step.

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The drivers are installed at the same time as GDSLAB. In order to reinstall the drivers, we need to rerun the GDSLab installation. Find your GDSLab USB/CD and follow the steps below:

• Unplug the dongle and restart the PC.

• Run the GDSLAB installer and tick all the options (excluding AdvCore drivers if running Windows 8 or later).

• Once the installation is finished plug the dongle to the PC.

• Wait a few seconds, you should hear the Windows sound indicating that a device was plugged into a USB port and Windows will finish the background installation of the drivers.

• Run GDSLAB, the dongle should be recognized now.

If notyou are still having issues, please proceed to the next step.

3. Possible issues with the computer USB drivers

There were a few issues reported in 2022 after a particular Windows update. This update will make the License Dongle unusable and unrecognised on the computer.

Please follow the steps below:

• Download the following archive by pressing the upper right button: https://drive.google.com/file/d/1N6Pqq1JCyI3nLncCmsny8gvfcOHcZYr5/view,

• Unzip (or extract the archive) and move the folder (Sentinel_LDK_Run-time_cmd_line) to the C drive,

• Unplug your license dongle,

• Press the windows/start button on your keyboard (or lower left corner button) and write CMD, open the application as administrator,

• Copy the line below and paste it in the CMD window you opened earlier

c:\Sentinel_LDK_Run-time_cmd_line\haspdinst -kp -r -fr -v -purge

• Restart your computer

• Press the windows/start button on your keyboard (or lower left corner button) and write CMD, open the application as administrator

• Copy the line below and paste it in the CMD window you opened earlier

c:\hasp_temp\Sentinel_LDK_Run-time_cmd_line\haspdinst -i -kp -fss -ld

• Restart your computer

• Plug in the license dongle and try GDSLab.

If you are still having issues, please proceed to the next step.

4. Re-register the HASL library

Unplug the dongle and unregister the file GDS_Hasp.dll located in C:\GDSLAB\Plug-ins

Once this is done re-register the file.

For more information on how to register/unregister dll files please refer to the article below:

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Once this has been done plug in the dongle and run GDSLAB. If the dongle is still not recognized at this point you may not have the necessary access permissions in your machine. Please bear in mind that even some Windows user accounts with full access can be limited by default admin restrictions. Contact your IT support to confirm this situation. It may be required to use the original administrator account to properly install these drivers, depending on local machine restrictions.

If you are still having issues, please contact us by following the linkhttps://gdsinstruments.kayako.com/en-us.

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