Windows 10 KB5031356 breaks network for Hyper-V Win10 VMs on Server 2012

  • Thread starter Thread starter David Shea
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David Shea

I am running a 2012 server. Hyper-V server with multiple Win10 Pro VMs. All was well until KB5031356 . This update breaks the network. TCP/IP doesn't work for the VMs. I can only access the VMs using VMC, and those VMs can't do anything without network access.Can't see network. PING reports "transmit failure".I tried creating a new virtual switch. No joy.I have some similar VMs running under a Win 10 Pro desktop and those aren't affected and they have this update installed.I have install all the current updates on the 2012 server. No joy.The only thing that gets them connected again is

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