One time I installed Age of the Empires on my pc when I didn't have a sound card, and it corrupted my hard drive <3
You can probably find a cheap
good sound card
here. I'd recommend something like
this one (should be $22 shipped), make sure to mention to them that you found it on pricewatch for a discount on it. (If you like Sound Blaster Live! 5.1 :P - That's what I have.)