Software removal Not recommended downgrade For offline and no internet use Do not upgrade Adobe Flash Player is an outdated and insecure plugin that prevents your browser from functioning properly. The installed "Adobe Flash Player" version on your machine includes harmful security flaws and is allowed. To stop using Adobe Flash Player, remove it immediately: Uninstall Flash:.. Downgrade Flash Player Downgrade OPTIONAL Avoid installing any version of Adobe Flash Player to ensure safety Uninstall viewing: