Step 1: Checking your player version:
If you want to check your current player version, go here: http://www.adobe.com/products/flash/about. You will have to do this in each browser you use, because the Internet Explorer (ActiveX) plugin is different than the one used for Firefox. This page also contains a table that will tell you the latest version for your operating system so you can be sure you have the most recent version that includes any security updates.

Step 2: Uninstall the current version of the flash player: Use the uninstaller package located on the adobe site at http://www.adobe.com/go/tn_14157.

Step 3: Install the new version of the flash player: Use the install package located on the adobe site at http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash

For more information, please reference the Adobe Support Center at http://www.adobe.com/support/flashplayer/ and a posting detailing the issues with associated with Flash 9. http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=44&catid=184&threadid=1243464&enterthread=y