yeah most motherboards have Realtek "high defenition audio", and if you're smart enough to install their drivers, you'll have 2 audio management programs installed, Windows' one and Realtek's. They have a fight and it ends up in games becoming uncompatible and crashing. Ill buy a sound card, from Creative of course. Also have my gaming Headset from Creative, Fatal1ty USB version :P
Anyways tell me if you run into the problem again, I'll try helping you but you didn't give much information on the error /crash you get.