If I understand, on your attachment, the HD Audio Device is not there currently, but the HD device with the Yellow exclamation mark is? It seems you have had problems about a sound device not installing correctly, as per your comments about Windows attempting to add a driver. If you right click the yellow mark and select update drivers, does anything happen? It might be good to get the basic driver straightened out prior to reinstalling the Realtek drivers. As you can see from Trouble's attachment, a video card can cause some sound devices to be installed. Nvidia will install HD sound drivers if you have a video card that uses them. On one of my systems with onboard Intel Video and Audio, I have an Intel Display audio device in the Sound section which you saw in an earlier attachment. But the Graphics driver and audio driver are on the referenced site. If you have both versions loaded on your system, it should have all the audio drivers it needs. When I install a new system, I will always load the chipset drivers first.....you probably already have those.