Once you are sure that you have the latest driver and you are still having the conflict, you can try this:
Delete both devices in the device manager, shut down Windows and then remove the soundcard. Reboot. Install the latest chipset driver driver intel that supports your board and them make sure the USB stuff is working. Shut down again and then reinstall the Soundcard. Boot up and install the soundcard driver. Sometimes the art in getting devices to work is all in the order in which they are installed. I always install Chipset drivers before anything else. I also always install the latest avaialble from the hardware vendor, not the Microsoft updated driver.