I've been running virtual box 4.3.6 with the latest guest addition perfectly but an upgrade appeared and I tried to upgrade to 4.3.8 and then a message of broken virtual box appeared. I tried many forums for help but in the end a message appears:

"The package virtualbox-4.3 needs to be reinstalled, but I can't find an archive for it."

Also my ubuntu software center and synaptic package manager are not working.
I cannot uninstall either.

I got this notifications
"An internal system error has occured
E: The package virtualbox-4.3 needs to be reinstalled, but I can't find an archive for it. E: Unable to apply corrections for half-installed packages"