Cannot update Microsoft Office Word 2011 to 14.2.3 on OSX
I had this issue once. I ended up backing up my data via Time Machine (for a get out of jail card) and then removing Office in it's entirety, rebooted my Macbook Pro, and then proceeded to reinstall Office 2011. Once I had the Office suite reinstalled the software  allowed me to apply all subsequent updates without issue. This worked for my particular instances / issue, results may vary depending on software environment.