VM WinSer2008 Virtual Machine network adapter is missing

User reaction using the process of abrupt interruption of network connection, through the console into the system to see that there is no network adapter,

View virtual machine hardware settings NIC configuration ok

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Reboot the system, check again still not, had to shut down the system

Check the virtual machine hardware configuration again to find that the NIC disappears

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Re-add the network adapter, configure the network, start the virtual machine system, found that there is a local connection, configure IP and so on can be connected properly

VM WinSer2008 Virtual Machine network adapter is missing