How to get correct driver for old sound card....I don't know brand and model no of sound card...
My os is windows XP 32 bit.
Sound card is external cad and it's attached to motherboard.
Download and run SIW.
under Hardware click on PCI and identify the 'audio device'.
You can download the ALS4000 Audio Driver for Windows XP here.
If it shows up in Device Manager, you can check the Device ID(1) on http://www.pcidatabase.com
This will tell you the manufacturer/model/number etc, and links to contact for the driver (or to help you google) Haven't tested with external sound-cards though.. question seems resolved, posted anyway, for posterity.
(1) Device Manager -> Item (right-click) "Properties" -> "Details" tab -> select "Hardware IDs"