Unable to connect to usb

Hello everyone, i just bought an arduino uno r3 and plug it into the usb port.
But there is such a strange problem :
both the green light and the yellow one light up, so the cable and arduino board are intact. But also Windows does not have any reaction, it's like that there is no device connected.
I tried to connect the arduino into the another computer but situation is the same.
Have you ever had this problem?

Try with a different USB cable or verify that your USB cable is working for data on another device. You may have a defective or charge only cable.