If all that doesn't work, here are things my kids always ask:
"Mom, did you check the settings on the antivirus security program" (you know like Norton, or in our case Advantquest)? I always forget I can look for the little icon on the lower right of the toolbar.
I say "NO, do I look like I thought of that?" The kids roll their eyes and act like they think I'm dumber than the cat.
"Mom, did you check to see if the pop-up blocker was disabled?"
I say "NO, do I look like I thought of that?" The kids roll their eyes and act like they think I'm dumber than the cat.
My cat just sits by the computer, on the keyboard to block the screen, and looks smug. My cat knows who's boss and it definitely isn't me because SHE controls the technology.
Moral of this story, keep the cat, they eat less than the kids.