Windows doesn't detect Mega when plugged to 2.0 ports

Besides the fact I can't upload any sketch right now - http://forum.arduino.cc/index.php?topic=271681.msg1914857 - I always had the problem the board is only detected when connected to the USB 3.0 ports, If I connect it to any of the six 2.0 port my PC has it doesn't take the driver, when I try to install it systems says "windows cannot find driver software for your device".
Any idea what is going on here?