I was trying to install Flash Player 11. I got, once the installer was downloaded and in trying to open it, the error message that "NOT installed. Installation errors encountered." Huh? NO further explainations, I could only close the installer. I went to the "Help" page and did the changes recommended. STILL does NOT work. I even, foolishly as it turns out, took off ( uninstalled ) Flash Player 10 thinking perhaps it was blocking the installation of Flash Player 11. Now I can NOT even re- install Flash Player 10. WTF?
Am using: Standard OS - Windows XP Professional
Have Browsers - Internet Explorer 8, Google Chrome
Can you post the contents of the FlashInstall.log file in C:\Windows\system32\Macromed\Flash ?
Also, try to download the full installers from http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#Ins tall_in_a_firewall_proxy_server_environment