Laptop connected to TV sound problems

Hello,
I just recently bought a 47" LCD tv and connected my laptop to my tv. The picture on here works great! It looks awesome, but the sound is messing up. At first I could here nothing, and read the forum to adjust the default sound output to my HDMI tv. And now for DVD's the sound is great, but for anything else like music or videos I downloaded from marketplace or youtube videos it has a clicking and popping sound going on along with the sound from the media. How do I get rid of the clicks and pops?