Application bar won't appear and MacBook won't shut down conventionally

When i load my Mac up it comes up with three error messages.
They all say:
+Application Launch Failure+
+The application "(null)" could not be launched because of a shared library error:+
And then the different messages have different codes:
- "<CNQL1208ButtonManager.app><CarbonLib>CFMPrivCarbonCore>"
- "<N12UButtonManager.app><CarbonLib><CFMPrivCarbonCore>"
- "<N067UButtonManager.app><CarbonLib><CFMPrivCarbonCore>"
I have a feeling i know what has caused this, i was updating the security software when an interruption with the internet cause my computer to freeze up so i performed a force quit.
The result of this is that when i've clicked the error messages away the application bar down the bottom doesn't load and (strangely) when i try to shut the computer down it doesn't do anything. Obviously i can just hold the power button down to turn it off, but i can't imagine it's good for it. I can still access my applications by pressing "Apple-Shift-A", but as an added issue when i go into a folder it doesn't have the usual "Applications/Documents/Music/Movie etc" on the left hand side.
Hopefully someone can help me out here.

Just needed to reinstall the latest security software.
Security software on a Mac in most cases creates more trouble than it cures.
"ButtonManager.app" does not appear to be something installed by the system. If the problem returns, try disabling that application.

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