The complete clean install procedure is described in http://forums.adobe.com/thread/928315
Download the offline installers from http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#ins tall_in_a_firewall_proxy_server_environment
If you still have problems, please list the contents of the FlashInstall.log file in C:\Windows\system32\Macromed\Flash
Please also list all files you have in that folder.
I have attempted the thread 928315 address in various formats but will not load.
Why is it Flash has operated successfully for over a decade and one update has rendered it a pain in the butt?
Becoming increasingly annoyed.
I am not a computer guru, I trust the instructions at this thread when correctly posted will be easy to understand, if not, how about the latest edition of Flash we update to corrects all these problems!
If you're finding that you need to reinstall every day, you might be encountering problems with file or registry permissions. Please see this FAQ that tries to clear these problems up: