When you download the sound driver files for the sound card you need to purchase them from genuine websites.
Since there may be a lot of dangerous websites, you need to ensure that you are using authentic websites.
Only authentic websites can provide better and flexible drivers.
Flexible and effective drivers are available only from authorized websites.
Also, you should have a high speed Internet connection and proper power backup for downloading purposes.
Get more information to fix Windows 7 Audio Driver Problems :http://supportformicrosoft.iyogi.com/windows-7/windows-7-sound-drivers.htmlhttp://social.technet.microsoft.com/Forums/en/w7itprohardware/thread/a4dee814-0c78-48de-98c9-7d8034cf5b38
Hope this information helps you.