You have to reinstall that particular software...

Windows Key issue turned out to be hardware and stupid user (me) so only the Duplicate Windows when hitting Play/paus on music services.

Having Spotify active on another virtual desktop and hitting play/paus created a duplicate window of Spotify (guessing issue might be same for any program that use the play/paus button on my keyboard)

Also, after installation of Dexpot my Windows key stopped working, as in it won't bring me into charms/start menu - and I can no longer use common windows specific shortcuts.

Any idea how I can restore the Keyboard settings?