Installation issue for Adobe Flash Player 11.8.800.175 (16.3 MB) for Windows 32-bit , English, MSIE

I have spent hours installing, deinstalling, and re-installing Adobe Flash Player 11.8.800.175.  My system is Windows 32-bit , English, MSIE.  I am told the installation is successful, then when I go to YouTube to verify, I still see a message,

"You need to upgrade your Adobe Flash Player to watch this video.

Download it from Adobe."

I have gone to Safety->Tools->ActiveX Filtering and unchecked that box, deinstalled Flash, and reinstalled it.  No change. 

I have gone to Internet->Internet Options->Security->Trusted Sites, and made sure Scripting is enabled, and did this for Internet and Local Internet as well. 

I don't know what to do.  I have spent hours on this, and I don't know what else to do.  Suggestions welcome.  So is Tylenol.