id summary reporter owner description type status component version resolution keywords cc guest host 18637 HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter WIn10 host, v6.0 RoryGriffin "Had VMs working. Win10 1809 update, then stopped working on all VMs. Now get ""Failed to open a session for the virtual machine KubuntuVM. Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter' (VERR_INTNET_FLT_IF_NOT_FOUND). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}"" of course removed existing adapter. Added a new one. It was manually configured. I did have to click Enable box. And still get this message." defect new network/hostif VirtualBox 6.0.6 all Windows