'Cleanup from any previous installer enough for _CheckInstallSuccess.'

def _CleanupInstall(self):

    if os.path.exists(self.install_path):
        shutil.rmtree(self.install_path)
        if os.path.exists(self.install_path):
            raise RuntimeError(('Install    path    still    exists:    %s' % self.install_path))
    subprocess.call(['sc', 'stop', self.service_name])
