Dell Laptop Latitude E6400 with Windows 7 Pro.
There is no sound. Device Mgr. shows a yellow mark on the audio driver. I deleted the driver , downloaded the IDT audio driver and ran the setup. IT took a long time and then said complete and rebooted. After the reboot was complete the sound still does not work and the yellow mark is still in device mgr. When I check the playback options, it only shows ANV virtual sound device so I am not able to choose IDT audio driver as the default.