I tried everything listed in the answers here but none of them worked.
Then all I did was to re-start XAMPP with administrator rights by:
Start menu - right click on XAMPP - select run as administartor
It worked. It is that simple.
I uninstalled IIS services, stopped WWW services, changed ports back to 80, blocked all apache and mysql connections from windows 10 firewall, but yes it still works!