I have the Imac 21.5- everything is fine but this. When I'm running Firefox, this seems to happen: 1) When I'm typing blogs like this, every so often there will be a pause and my typing will stop. Then it will work again. It's a 2 second delay, and happens repeatedly. 2) When watching YouTube videos, the same thing happens. The video will be fully loaded, but as it plays there will be 2 second delays during the playback. Why is this happening? And when I'm running Safari, this is not an issue.