Hi,
1. What is the make and model of the sound card?
2. What is the make and model of the computer?
I would suggest you to first try updating the latest drivers for the sound card and check if it helps, here is the link:
http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
If you don’t get the drivers in Windows update, then try going to manufacturer’s website, download the latest drivers for the sound card and then try to install it and check.
Azam – Support Engineer.