id summary reporter owner description type status component version resolution keywords cc guest host 14832 Unable to use Host-Only adapters on Windows 10 Threshold 2 kohenkatz "I installed the new Windows 10 update ""threshold 2"" via Windows Update, and VirtualBox is no longer able to use Host Only adapters. While it creates them, changes their IPs, and deletes them with no trouble, the following error message comes up when I try to run any VM with a Host Only interface attached: {{{ Failed to open a session for the virtual machine Ubuntu Test. Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter' (VERR_INTNET_FLT_IF_NOT_FOUND). Failed to attach the network LUN (VERR_INTNET_FLT_IF_NOT_FOUND). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed} }}} This worked with no trouble before the Windows Update, and all other adapter types still work perfectly. I originally had this issue with VirtualBox 5.0.1, so I uninstalled that one and installed 5.0.10, and I still have the issue. Log file attached." defect reopened network/hostif VirtualBox 5.0.10 all Windows