I've been reassuring people for decades that computers are confusing, it's not just them. My go-to example is quite simple...<p><pre><code> "You have two folders, with files in them, if you drag a file from one to the other, what will happen?
Depending on rules you can't be expected to remember, one of three things will happen. It might copy, move, or make a shortcut to the file.
If you right-click (the other mouse button) on a file, and drag it to the destination, you get to choose which thing you want done, every time."
</code></pre>
This little instruction saves boatloads of time for Windows users. It's sad that there isn't a right button in the Apple world to help make things easier.