After Many hours of fighting this, I successfully downloaded a working version of Flashplayer 11.6.602.180 from http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html
It has many versions for operating systems, including Android. I dont know about Mac or Linux, but the windows version (about half way down the page) worked for me in IE & Firefox.
I hope this helps some of you, as I have spent almost all day on this (about 9 hours).
May I recomend that before extracting the zip file, your shoud uninstall the previous version & run Ccleaner & run Ccleaner for the registry as well then do your extraction & run the installation from there.
Good Luck, Rusty