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Thanks ODTech for more insights. I also want to add something, because my problem is not really solved, it reappears each reboot or hibernation. I wrote scripts that automatically restore the connection on the event there is not the possibility of contacting a dns server (event IDs), by uninstalling...

I would like to update the issue and post a solution. In fact, here VB was not at all working since months for this issue. I found out ad advice of resetting the registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\Config Being a bit skeptical, I did a backup, removed VB, remove...

There is very weird behaviour happening with the filter. First of all, it was already there. So I tried to uninstall and reinstall it. OK. Well, it is installed (so it seems, it's in the list, at least) but it gives major problems with the network card: while Windows reports a stable connection to &...

This is the same machine. But, wait, the error just changed, after the upgrade, and I didn't notice. It's still complaining about the network card not found, but in particular now it says: Unable to open a session for the Virtual Machine MyGO_1. Failed to open/create the internal network 'HostInterf...

Does this mean Virtual Box has no drivers correctly signed and recognised by the 64bit system's driver signature enforcement? I'm quite confused. I mean, if the host-only driver is there, for which reason other companions, ie the filter driver, should be blocked? How to check if that's the case? Tha...

Which drivers should I check for? I would like to use only the bridged mode. Other modes work (host only for example, which has a driver installed)

Thanks.

Hi,
disabling the AV doesn't help at all.
Untill today I stayed with the old version.
Today I tried to upgrade again to 4.3.6. Still the same exact problem: VMs are unusable.

I went through many troubleshootings and obtained nothing. Reset winsock / network on Windows in any kind, re-installing antivirus/firewall, drivers, and so on. No way. I came to a resolution using system restore to a previous version. VirtualBox started working fine again then, in its old version i...

Hi, I tried doing the removal, reboot, re-install cycle. VirtualBox re-installed the host-only adapter, another ISATAP appeared, and also two miniport driver(s) have been installed, linked to the Marvell actual network card. I don't really know if/why they should be two...or just one... Anyway, Virt...

Thanks for your answer. I would like to add that these interfaces are shown due to I activated "show hidden devices" under the "View" menu of devices manager. I'm not sure when/why they have been installed but I see ISATAP and Teredo use Microsoft-made drivers, both signed-by and...

Hi, I was using: VirtualBox version: 4.2.x Host: Windows 8.1 x64 Guest: Ubuntu Server I accepted to upgrade to 4.3.4 r91027. Everything went alright, except when I try to open my VM, this is what I get: Failed to open/create the internal network 'HostInterfaceNetworking-Controller Gigabit Ethernet P...