The following was my interjected response to "Audio Problem" in another forum: I have a very similar "Sound" problem. I have a dual boot setup, Win 7 64 and XP Pro 32. I have a brand new ASUS sound card. All is fine in XP. Sound card is not detected in Win 7. How is it possible to install drivers to a device that isn't there? I have not yet found a fix as I only clean boot installed Win 7 Ultimate yesterday (and already don't like it) but I am a very determined person, and if there is a fix, I will find it. I do however believe it to be a flaw of some sort in Win 7 as it doesn't even detect the card. I just had back surgery and it isn't easy working on pc's. but I will give it my best shot. I plan on installing 3 sound cards at the same time. This is only to see if Win 7 detects any of them. I will let you know the outcome as soon as I can. In the meantime, I suggest a different approach to the problem. Like I stated earlier, I believe the problem lies in the operating system. How is it that the sound card is not even detected? As in your case, block306, Win 7 sees your sound card intermittently. Try the following please. Go to filehippo.com, download, install and run Speccy. You will find it listed under "System Tuning". Then go from there. Keep me posted. I am still working on display issue with Win 7.