def METHOD_NAME():
    '''Set up bootstrap mode'''
    # turn off auto login of FV unlocking user
    disable_fde_autologin()
    # create CHECKANDINSTALLATSTARTUPFLAG file
    try:
        open(constants.CHECKANDINSTALLATSTARTUPFLAG, 'w').close()
    except (OSError, IOError) as err:
        reset_fde_autologin()
        raise SetupError(
            'Could not create bootstrapping flag file: %s' % err)