Do you have a plug-in soundcard, or is it onboard?
It it's onboard, then you can easily find out what motherboard you have with CPU-Z (freeware) : http://www.cpuid.com/cpuz.php
You can then go to your motherboard manufacturer's website and download the sound driver.
If it's a plug-in card, it may be identified by name upon bootup when your machine POSTs and enumerates the detected PCI devices.
It it's onboard, then you can easily find out what motherboard you have with CPU-Z (freeware) : http://www.cpuid.com/cpuz.php
You can then go to your motherboard manufacturer's website and download the sound driver.
If it's a plug-in card, it may be identified by name upon bootup when your machine POSTs and enumerates the detected PCI devices.