I can confirm that Google has not and never will do pop-ups, at least as long as I work here. You have a scumware program on your computer.
The only pop-up Google has ever done is when you download the toolbar. We do a pop-up with that big red "please read this--it's not the usual yada yada." We do that so that every toolbar user will understand the advanced toolbar features.
But Google doesn't do any pop-ups for web searches.