I've seen the error related to IntcAzAudAddService on various forums as well. There were users who had the same problem with the update. The safest way to overcome this issue is to reinstall the driver provided by the manufacturer of your motherboard. Simply reinstall the one added through Windows Update and download the one from the manufacturer's website. It shouldn't matter if it was released for a different version of Windows, but as long it's XP or Windows 7, you should be fine.