By what you have mentioned there you have tried every step that I could up with. I would try to list what you haven't mentioned above.
1. When you play a wma in media player, does it say "No Audio Device Detected"?
2. Is the sound muted? Check the volume control.
3. In Services > Windows Audio > Automatic is not enough. After you choose Automatic you have to apply and click Start. Then a progress bar displays and it says Enabled.
Just consider the above stuff as a checklist. I know you are not a n00b.
Good Luck mate!