/StartupItem/ Error, How to resolved the issue? I'm using Macbook Pro late 2011 and I'm getting this error in my startup.

I've already performed Repair Disk Permission in my Utilities; 
I've also upgraded from Lion to Mountain Lion (10.8.3) but non of the solutions repaired it. I don't want to install fresh Mountain Lion and re-install again, it would be a tedious solution. Any idea how can this be resolved?

Errors Screenshot:
Looks like you need to reinstall VirtualBox.