Cannot Install Adobe Flash: Fix

Several users have reported an inability to install Adobe Flash Player, generally accompanied by the error message “Unable to authenticate install.”

Fix This problem can usually be quickly fixed via the following steps:

1. Uninstall the Flash Player by navigating to this Adobe page then downloading and running the appropriate uninstallation program
2. Next, right-click your Web browser’s icon or listing in the Start menu and select “Run as Administrator.” Navigate to the Flash download page, then download and install the Flash Player.

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