"Select to Copy and Middle Click to Paste" in Windows

Well, there's the True X-Mouse Gizmo, if that works in your Windows version (it's a bit dated).

If you're looking for an AutoHotkey script, this one should probably do!

Here's an implementation for copy on select. You can simply select some text and it is copied immediately without having to press ctrl+c.

Conveinent middle button paste is also provided, but with a twist. Middlebutton is useful in browsers, so there is a short time (configurable) while you can paste with the middle button after copy, before original middleclick functionality is restored.

Also, if you click with the right button it cancels middlebutton paste.

Since after selection you usually click with the left button to the place where you want to paste, so that you put the focus there, it is done automatically when using middlebutton pasting.

clipx integration is also added to Ctrl+middlebutton.

I've been using the script for a few days and it's quite convenient. Sometimes the copy tooltip appears unwantedly when something is dragged, but it doesn't cause any problems.