updating flash player

I am on an iMac, OSX, 10.9.5.  I am trying to update or install a new Adobe Flash Player.  I was directed to the flash player icon in my System Preferences.  I clicked on "updates" and a window opened asking for "owner" and "password."  I put in my username and password and it would not take it.  There is no link for "have you forgotten your name and/or password?"  How can I get in if I do not have that information.  I have my username and password written down but when I put them it the box just wiggles and will not let me in.  "Notify me to install updates" is checked but I'm never notified.  I'm trying to change it to  "Allow Adobe to install updates."  But I can't make the change because I don't have the right "owner" or "password."  Although I was able to sign in at the top of the Adobe Forums page with my username and password.  I guess "username" and "owner" are two different things?  This is so frustrating.  I've trued several times to update my Adobe Flash Player with absolutely no luck!!  Help!!!  Thanks, Anne