What's wrong with my computer? (Itunes/videos)?

Whenever I play music on itunes, my music 'skips'. Kinda like a broken record. And whenever I play videos on YouTube, they skip as well. (stop then start again) Its been going on for about a week now. I have the latest version on itunes, and I ran 3 spyware checks, everythings fine. I defragmented my computer and have 71% free space...i cant think of anything else.

thanks.

What's wrong with my computer? (Itunes/videos)?virus protection

first find and run spybot search and destroy cuz if its skipping thats usaly a sign that sumting else is running ur resources into the ground

What's wrong with my computer? (Itunes/videos)?agv

try uninstalling your audio card and reinstalling it......