I tell you what, Adobe is TERRIBLE with it's updates. Adobe Creative goes like this. Download new updates, oh wait, Download new manager update, Download manager update fail, restart, delete these library files, install something else, manager update fail again, try again, manager update successful, application update fail, restart manager, try again, ...........
Now this, Flash can't update, follow the troubleshooting techniques none of it works. THE ANSWER: in the forums, download the stand-alone update. Ok Adobe, instead of wasting my time trying to figure out all your crappy update situations why don't you do something about your install procedures. Make it simple.