Here's a different example. I was trying to install CutePDF when I was presented with a screen that was going to change my browser search options. I unchecked the boxes and and clicked Next and got this screen.
I clicked Ok and clicked Next again. And I got the same message to select checkboxes or click Next without selecting the checkboxes. I clicked OK and clicked Next. And got the same damn screen a third time. By now most less-than-savvy users would select a checkbox and click Next just to get past this. But I persevered and this came up next.
Again, most people would numbly click Accept thinking they're clicking Next and then wonder why they have some weather thing loaded up all the time.
Of course, removing local admin privileges nips all this in the bud.