Download IDT 92XX audio driver ( from intel website ) for Vista operation system .
Install the driver.
Don't make restart after the installation !!!
Now Win 7 will tell you that is a problem in the audio driver, when the problem report will shown up press cancel.
Click on sound control at the right bottom of the screen , as you can see win 7 detect your Speakers as a Headphones.
Click on mixer.
Under Applications click on system sounds icon.
Change your setting of Defaults Device from Headphones To Speakers
(click on Speakers and after that on set Default button).
Press OK
Make restart
Now the audio driver is setup properly!
Install the driver.
Don't make restart after the installation !!!
Now Win 7 will tell you that is a problem in the audio driver, when the problem report will shown up press cancel.
Click on sound control at the right bottom of the screen , as you can see win 7 detect your Speakers as a Headphones.
Click on mixer.
Under Applications click on system sounds icon.
Change your setting of Defaults Device from Headphones To Speakers
(click on Speakers and after that on set Default button).
Press OK
Make restart
Now the audio driver is setup properly!