Hey goolarra -
Congrats on the new computer!
It probably is the ads, an updated browser with more
graphics, more flash
graphics - everything combined. What browser do you use?
I do wonder about the ad that slows everything down contributing to this. The next time it happens, can you right click on the ad, go to properties and copy the url that it shows, and paste it here for us? How often do you see that ad?