USB HID not working in Windows 10?

I have sent the following code to the espruino pico and saved:

var kb = require("USBKeyboard");

setWatch(function() {
  kb.setModifiers(kb.MODIFY.SHIFT, function() {
    kb.type("HELLO WORLD", function() {
      kb.setModifiers(0, function() {
        kb.tap(kb.KEY.ENTER);
        LED2.toggle();
      });
    });
  });
}, BTN, {debounce:100,repeat:true, edge:"rising"});

The LED2.toggle() works perfectly after unplugging and re-plugging but nothing happens when I press the button when I'm expecting "HELLO WORLD". I am fairly new so I apologise if I've simply missed something obvious