Sometimes, depending on the driver version and the hardware platform of your laptop/PC, the driver causes the system to freeze (blue screen) or a connection delay.

To resolve this problem: 

1. Uninstall the previous version(s) of the driver. To do this, enter Control Panel and choose "Uninstall programmes". Search for "Silicon" or "Silabs" - you may have one, two or three programmes to uninstall - these are the old versions of the USB driver from Silicon Semiconductors Laboratories.
2. Install the latest driver by following this link: http://pelvitec.emgsoft.info/en/3
3. ​Restart the computer/laptop and wait for the computer to fully load. 
4. Switch off your device. 
5. Connect the white fibre optic USB stick to the computer/laptop and make sure that the yellow LED on the adapter is shining. If so, the drivers are ready. 
6. Log in to the Pelvitec Software. 
7. Switch on your device, making sure that it is connected to the adaptor and in turn your computer/laptop by the fibre optic cable.