In Relation To... http://ubuntuforums.org/showthread.php?t=1958969

[knc2]

So, I get to the websites and download the extension package but it doesn't work an error message comes up... It is...

Result Code:	NS_ERROR_FAILURE (0x80004005)
Component:	ExtPackManager
Interface:	IExtPackManager {3295e6ce-b051-47b2-9514-2c588bfe7554}

I have tried all four versions.
Please help.

[ibjsb4]

You have tried all 4 versions of what? vBox? Didn't know we had that many.

Have you tried the general fix command?

sudo /etc/init.d/vboxdrv setup