I have a Lenovo u430p laptop running windows 7 and the 2 USB 2.0 ports are not working. they will not recognize a flash drive or my iphone (all i have plugged in so far). Is there a driver i am missing? I checked device manager and there are no yellow exclamation points on anything. I also tried uninstalling the USBs and rebooting and still no yellow exclamation marks. The USB 3.0 is working fine.
thanks in advance.