what is your os
what is your maker...did you build this or is it a premade brand?
uninstall all installed sound card related software
remove any improperly installed sound card entries in device manager
reboot
download siw and belarc...rely on them to tell you what you have
SIW | Download Belarc Advisor - Free Personal PC Audit
soundmax is onboard audio?
This is my general search to get you started:
from here:
Live Search: adi codec soundmax drivers
first find:
Analog Devices: Audio CODECs: Audio/Video Products: Home
If this is onboard and from something like Asus or HP, etc
You will need or should get their drivers.