Not effective

There's this point during a Windows upgrade when a message appears on the screen. It says, "All your files are exactly where you left them."

Now, the folks at Microsoft probably thought they were doing users a favour, simply trying to convey a comforting message about the upgrade not having any effect on your existing documents, etc.

A computer savvy person reads this message and thinks, "Duh! Of course they are. I'm not stupid."

A normal user is like, "Why are you telling me this? WINDOWS!! WHAT DID YOU DO??!! Did you mess up my files and then fix them in a panic? What's going on?"