Hello,
I plugged an arduino UNO on my computer (windows 10) for the first time, 2 leds are switched on.
I would like to use it but I have no access to the different ports. Someone told me to check my drivers but I have no unknown peripheral device on my computer, like if nothing was detected.
Make sure the USB cable is fully inserted into the USB jack on the Uno and your computer. Especially with a new Arduino board, you might have to use a bit more pressure than normal to get the connector all the way in. An incompletely inserted USB connector can provide a power connection (and thus light the LEDs on the board), but not provide a data connection (and thus no port).
Try a different USB cable. You might have a damaged, defective, or charge-only cable that doesn't connect the data lines.