Para actualizar esta extensión a PHP-7 se está trabajando en https://github.com/win32service/win32service
Ya ha disponibles algunos binarios para poder probar.
To update this extension to PHP-7 is working at https://github.com/win32service/win32service
Some binaries have already been available for testing.