Bitdefender not updating 2016
Alternatively, you may have turned it off by accident or mistake.So, it makes sense to check it once again, and re-enable Update if not enabled.
We are not talking about the common, well-established Trojans, Spyware and other threats.
They are also resolved in the shortest time possible.
That having said, to get all these benefits, you need to update your Bitdefender Antivirus regularly.
You can shutdown by holding the shift button and click on power button Shutdown or lock your screen and shutdown the computer from there.
UPDATE: Seems Bitdefender has pushed an update and fixed the shutdown issue.