I have noted an Adobe user name and password I had to reset on 10/10/13. Yet it is found invalid when I attempt to install the new update of Flash. I even re-set the password just to make sure and tried it again. Same thing: invalid. No way to contact Adobe Support. What the heck can I go? Can't change my other Mac to Mavericks if it makes it impossible to use Flash anymore. What is Adobe thinking? They are just as bad as Google.
It's NOT your Adobe password that's required. It's your Operating System Admin password. You need that to install ANY software.
Adobe DOESN'T run your Mac, and they DON'T run Apple.
That's the first thing I tried, of course. My Admin user name and password that work for all other installs didn't work either.
It's easy to understand why Apple doesn't recommend Flash...