FeedBack/Echoing@Counter Strike 1.6

[Mmmm]

Hello guys,

I have a really bad problem and i need your help...After i did the updates for Steam my sound in the game (and exaclty with mic sound) have problem...When someone speaks with mic i hear something like akfjsdgkjfdgkljdfgjdfkjgd and i cant understand or i hear echo things like ( when someone told me GO GO GO with mic i heard GOOOOOOG ) can someone help me please??? (Sorry for my bad English)