[uripyores]

Did you get a disk with the motherboard, if so it should have the drivers you need on it.
I know you said you have installed the sound drivers but was that for a separate soundcard, or do you mean integrated sound?
Look in Sounds & audio devices via the contol panel and on the audio tab, see if yours is the default device for playback.

 

[uripyores]

Presumably you've checked to make sure the volume isn't muted. And did you look in device manager for any yellow marks?