Yesterday I upgraded my windows XP system to flash player 11.9.900.152. Because of incompatibility issues with other applications, I must roll back to version 11.9.900.117. What are the steps that I must follow to complete this task? I am not a very technical person. Thanks.
Download the uninstaller
Run it to remove the current version.
Visit: http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html to find the appropriate older version. Download the zip file, expand it, and use the correct installer.