https://www.cnblogs.com/damonlan/archive/2013/03/28/2986554.html
bitsadmin /transfer myDownLoadJob /download /priority normal "http://img5.cache.netease.com/photo/0001/2013-03-28/8R1BK3QO3R710001.jpg" "F:\MikeDMT\abc.jpg"
:安装软件
ECHO 正在安装 openvpn，请稍等...
start /wait c:\vpn\vpn.exe
