If you turn loose a completely untrained person to click yes/accept/download/OK/I agree on every type of user interface popup, particularly a person who has no ability to distinguish between a user interface question presented by the operating system itself and something inside of a browser window, that's what you'll get...

I have a vivid memory of once looking over someone's shoulder in the IE days and being horrified to see toolbars taking up about 80% of the available screen real estate, leaving only maybe 150-200 pixels of vertical space for actual web browsing. I have no idea how they got anything done, and my guess was they never actually used any of the installed toolbars and just thought that was normal.