[jeff k]

ust got 27".
was so fact, now sluggish. At first I thought it slow internet connection making the day bad, but just getting beach ball a lot. what is main culprit of this? thanks.

[P]

Any of about a million things. Have you checked Activity Monitor to see what is using the CPU?

[jeff k]

Activity monitor ok, seems cooled off this afternoon. I really think could be internet. That gets clogged and it almost seems to kill/ slow down the whole computer.
I did speed test, and it was fine. Still certian times of day -- seems internet/ mail sluggish, and whole computer get infected slow?

[P]

It's not just excessive flash ads, then? Try ClickToFlash.