Because the project requirements, in Windows 7 virtual machine to install a software, when used to be connected to the Internet, and must use the host - only way connected to the host (host is win10 systems), according to the following link to https://jingyan.baidu.com/article/d8072ac497452aec95cefda5.html, the method of successful ping, and virtual machine connected to the network, but when I host after the restart, and then open the virtual machine is found the network connection error, I did not change set IP, why is this so?? Bosses give directions,