def METHOD_NAME():
    """Force the logout of interactive GUI users and spawn MSU."""
    try:
        procs = find_processes(exe=LOGINWINDOW)
        users = {}
        for pid in procs:
            users[procs[pid]['user']] = pid
        if 'root' in users:
            del users['root']
        # force MSU GUI to raise
        fileref = open('/private/tmp/com.googlecode.munki.installatlogout', 'w')
        fileref.close()
        # kill loginwindows to cause logout of current users, whether
        # active or switched away via fast user switching.
        for user in users:
            try:
                os.kill(users[user], signal.SIGKILL)
            except OSError:
                pass
    except BaseException as err:
        display.display_error('Exception in force_logout_now(): %s' % str(err))