It seems like Adobe is releasing new Flash Players on a regular basis to deal with security issues.  It’s important to remove old versions of Flash Player prior to installing the new version.  Otherwise, you’ll keep remnants of the vulnerable versions on your system.

Here’s a very simple way to uninstall your previous version of Flash Player:

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    1) Download the most recent Flash uninstaller.

    2) Close all browsers and applications that may use Flash Player, including AOL Instant Messenger, Yahoo Messenger, MSN Messenger, or other Messengers.

    3) Run the uninstaller with the /silent option:

    uninstall_flash_player.exe /silent

    You can also test to verify Flash Player has been uninstalled.

    Note: Internet Explorer users may have to reboot to clear all uninstalled Flash Player ActiveX control files