When I go to a site that contains Flash content, it says "A plugin is needed to display this content" and there is a link to install the plugin. Additionally, there is a message at the top of the page that says "Additional plugins are required to display all the media on this page" with an option to "Install Missing Plugins." I click the link to install the missing plugin, and a dialog box pops up that says "The following plugins are available:" and lists "Adobe Flash Player 11.0.1.152" with a check box next to it. The box is checked, and I click "Next" to install. It goes through the motions, and then tells me that "No plugins were installed." There is a link to manually install the plugin, which takes me to Adobe's Flash download page. I unchecked the box to pair McAfee Security with the download, and downloaded the latest version of Flash (to be honest, I've actually downloaded this exact same version about 10 times today). The dialog box pops up, I save the file, and once it has downloaded, I open the containing folder (my downloads folder). I then close all programs (including Firefox) except for the Windows Explorer folder that I'm going to run the installer from. I double-click on the Flash installer to run the installation. The installation process completes, the installer tells me that the download is successful, and my browser opens back up with an "Installation Successful" message from the Adobe website. Yay! My installation is successful... Orrrrrr not. Navigating back to the page with the Flash media - still have a message saying I need the plugin. Attempt to download plugin again...no dice.