Elegoo Uno R3 card is not recognized on my computer.

Hello, I'm new to arduino world ! I received the Elegoo starter pack a few days ago. When I plug it into my computer: it is not detected in device manager (it was as if I had never plugged it into my computer) I search in hidden devices, it is not there. In COM, it's not there. The card turns on perfectly when I plug it in. I've tried on a different computer (2), but it doesn't work. Change connection cable, no more. I asked Elegoo's customer service for help, they sent me back a new card and still it doesn't work (I tested it on 4 different computers running Windows 10 including one running MacOS). I really don't know if it's potentially because of my anti-virus