Thanks very much for your response. I've removed the Skype App (I'm on Win 8.1). No change. As for TeamViewer, my advanced settings don't have a "don't use port 80" option, so I'm stuck there. I tested port 80 in WAMPserver and it says only being used by Apache and PHP, so that's good news. Below is my error message:
[07-Oct-2014 20:08:32 UTC] PHP Warning: PHP Startup: Unable to
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