virtualbox.org

I have a Mackbook with MacOs Leopard running VBox v4.04 (with Windows).
I tried to upgrade it to the latest version today, 13th Oct'11.
I got a message: "download 'Oracle vm Virtualbox Extension Pack' or disable USB 2".
I tried to download the 'Oracle vm Virtual Extension Pack' but it said my own version was newer, so I didn't do it.
Instead I tried to disable USB 2 but I could not get into the settings to do it (greyed out)

I then went to Time Machine and tried to restore the previous version of the VirtualBox application.
But when I tried to start it up, to my horror it gave a message: "terminated unexpectedly during startup with exit code 1".
With details:-
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Machine
Interface: IMachine {662c175e-a69d-40b8-a77a-1d719d0ab062}

Please someone, what can I do now? I also get another flag saying "RTR3Init failed with rc=-1912 (rc=-1912)" which I click abort.
I havn't a clue what is going on. Did I do something wrong? Can I restore it using Time Machine?
I am very shocked and just hope there is some kind soul out there who can help me.

Paul Tilling

Paul, after installing VirtualBox 4.1.4 please go to the "Help" menu and choose "Check for updates...". This menu item will not only check for a new VirtualBox release (of course you already installed the latest release) but it will also check if you installed the correct extension pack. I expect that it will notify you that you should update the extension pack. Just follow the steps, you only need to click on several times and enter the admin password when asked.

After you did that and you still have problems starting your VMs, please come back and I will try to help you further.