VirtualBox can't find host-only adapters on Windows 10 host => Fixed in SVN
After the creation of host-only adapters with VirtualBox 5.0.2-102096 on a Windows 10.0.10240 host (which was fixed with #14040), all newly created interfaces disappear when reopening the network preferences dialog. It also impossible to assign host-only adapters to existing VMs. The adapters do appear in Windows Device manager though.
I get the same results when using the command lines tools. The creation of new interfaces works without problems:
C:\> VBoxManage.exe hostonlyif create
Interface 'VirtualBox Host-Only Ethernet Adapter #5' was successfully created
But VirtualBox can't find the adapters, as the following command does not return any output:
$ VBoxManage.exe list hostonlyifs