Azalia/AC’97 High Definition Audio Driver Windows 7
In one of my previous posts I have given a solution for solving the problem of Realtek High Definition Audio not being recognized on Windows 7.
Today I was dealing with nearly the same problem but on a different PC. It was a Medion PC (not relevant), of which the motherboard had an onboard Azalia/AC97 Audio controller. Windows 7 just displayed that there was no audio device recognized, so I went to the BIOS settings as described in my previous post, but the problem was that it had only two choices: Auto and Disabled. So there was no way of getting it to work with the solution I described before.
Luckily, I found another solution that worked very well and solved the problem. You can do the following:
1. Download the following file: UDAX009-AZA10-Logo09.59.73-flexbass
2. Unpack it.
3. Right click on the file setup.exe and click on properties. Now in the tab Compatibility change the Compatibility mode to Windows XP Service Pack 2.
4. Now run the setup as administrator. This is important since it needs administrator privileges to its thing.
5. When the setup is finished, restart your system and you should have your audio working. 
I think this can help a lot of people that are currently dealing with the same problem. Much thanks goes to Luis Rato who described the original post and provided the above file. In case you have additional problems, visit his post here.
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this helped solve the problem
many thanks
Wow, this solution worked out for me. I’m impressed! I’ve been using Realtek AC97 high definition for quite some time and had no problem at all, until recently I tried to change to Windows 7. I also went through your previous post but I just couldn’t manage to get around it on BIOS.
many thanks mate, i’ve only had W7 for about an hour now, n the sound issue is driving mad!!!
@Robert, good thing it worked for you..Sad it didn’t solve my case. I also read the post about BIOS, but I’m not quite sure how to do it, I’m a newbie. Sorry but I’m really slow when it comes to computers…I managed to find an easier alternative that worked for me, so I thought of sharing it for additional ideas.
you are a genious