Nothing happen in my keyboard.
Hm, got something else taking that hotkey? Or does pressing the Win button require to also press another button like <Fn>, on some laptop keyboards?
You could replace the hotkey definition of ^!#4 by something simpler like ^4 so only Ctrl-4 needs to be pressed, just for testing.
Btw, what application is active when you apply the hotkey, after you have selected some text? (I've been testing with the forum-message 'Quick Reply' input-box of my browser)