我是弄成 xxx.bat 放到啟動
netsh interface ip set address LANstring dhcp
C:\WINDOWS\system32\rasphone.exe -h 上網(我是叫上網，看你網路連線的名字叫啥)
ping 127.0.0.1 -n 4>nul
@Rem delay 4 seconds for reconnect net and to free-sapce download
C:\WINDOWS\system32\rasphone.exe -d 上網
http://i6.minus.com/iyAPoTmoYqE7z.png