Probs w/update-manager, software-center & aptdaemon

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http://ubuntuforums.org – Ubuntu 12.04.2 AMD 64-bit, which is up to date running 3.2.0-45 kernel. I have thee problems that I think are all releated and I don't remember when these problems first started but it was probably several weeks ago. I believe the problem started after a routine update as I have not installed any new packages in months. The first problem is that nothing happens when I click the "Install Updates" button in Update Manager. The second problem is that Software Center just produces an all white window. The third problem is that aptdaemon won't start. But I can run apt-get commands m (Hardware)