virtualbox.org

Hello guys , i don`t know whats the problem so I will explain it in details.
When I use NAT - with any type of virtual network adapter - i got no connection.
When I use bridged network - I got this error : Failed to start the virtual machine ****.
Failed to open/create the internal network 'HostInterfaceNetworking-
"""CardAdapterName"""
Details :
Result Code:E FAIL (0x80004005)
Components:Console
Interface: IConsole {0a51994b-cbc6-4686-94eb-d4e4023280e2}

And i can`t create Host-only adapter in the File->Preference->Networking menu , so I can`t select any adapter in the networking settings of the machine.
I use the 3.0.2 version of the Virtualbox ,Host-Windows7 , Guest -Backtrack4(Ubuntu based)

Moving to Windows 7 Host

Most of the time this happens is due to a failed install of VirtualBox.
Reinstall VBox by right clicking the install program and left click on run as admin.
When presented with the install options select repair. Reboot when complete.

If this fails then reinstall the VBox program as stated above but select uninstall. Reboot and then run the install by right clicking the install program and left clicking on run as admin.
Reboot when complete and then setup/ start the guest and see if it works this time.