In order for this to work, you will need to do (A).
User: Help, I need my application to work!
Me: Have you followed the instructions?
User: Yes, I’ve done (B) and (C).
Me: Have you followed the instructions and done (A)?
User: Yes, I’ve now done (B) and (C) twice and it’s still not working. I’ll try (D) next.
Me: You just need to do (A).
User: (D) didn’t work, you’re wasting my time.
Me: Can we go back to the initial instructions, please. Read them carefully and follow all the steps detailed there.
User: I’ve asked around and I’ve been told to do (D) again, and then follow it up with (X), (Y), and (Z). Twice.
Me: Perhaps you could try (A)?
User: (D), (X), (Y) and (Z) didn’t work. You know nothing.