Ok, I have black macbook from 2007. I love it and wish they bring back the black for one of the computer product lines. I would buy it instantly. Anyways, I was looking up some stuff about men's health for research. I did go to websites that I was unfamiliar with but looked at the links to see if it was worthy. After I was done with that, I went to listening to music on youtube. I played a song and it would play without sound. I tried a different video, no sound. I tried a different website, still no sound. While traveling to the different sites I would a beach ball momentarily. I was able to get to the site. I reset safari, then restarted my computer. It didnt work still. Then I went to youtube, and it started working. No beachball lately. But now, the song or video will pause or skip for a second then continue. It has gotten me really worried and suspicious. I had all kinds of problems and virsuses with my last pc. This is my first apple, its one of the reasn i switched. I didnt have problems until now.