Some users are more clueless than others. They're the recurring callers; the ones who are always stymied by the simplest of error messages.
When you help them, they're not always with the program.
Here's a classic example...
Special User: How do I open a file?
Me: Double-click it.
Special User: I did, and nothing happened. Come look.
Me: Ok, show me.
Special User: *Right clicks on a file twice* See? Just that silly pop-up menu.
Me: Double-click with the left mouse button.
Special User: *Right clicks on the file twice* Still doesn't work!
Me: The other button.
Special User: *Right clicks on the file twice* Nope!
Me: Your other left mouse button. There's only two. Use the one on the left. The one closest to your keyboard.
Special User: *Right clicks on the file twice* Why won't this work? I'm doing it right!
Me: Yes, you're doing it with the right mouse button, which is incorrect. Try this one. *Touches the correct button*
Special User: *Right clicks on the file twice* I hate computers!
Me: No, you don't. Try this one. *Touches it again*
Special User: Oh, the left one! *Left clicks on the file twice* Ok, you fixed it!
Me: Glad to help! *Walks away mumbling* *Right eye twitches*