Thank you for your response! Now I can see your screenshots.
The reason why your PC does not recognize the connected device is that you did not install USB drivers related to the device recognition.
The USB drivers you can find HERE.
Then, you will need to extract and run TeltonikaCOMDriver.exe. After it, click Next in the driver installation window, and in the following window click the Install button. Finally, the setup will continue installing the driver, and eventually, the confirmation window will appear on which you will click Finish to complete the setup.
More information about the devices and their first starts you can find on our Teltonika Telematics Wiki page.