Ultimately what I had to do, was quit all the browsers and uninstall the Flash plug-in. To uninstall the Flash player, follow the instructions below:
- First, go to Adobe's site and download the Flash Player to your desktop.
- The quit all your browsers, both Firefox and Internet Explorer.
- Then open the Control Panels under the Start menu, and select 'Programs and Features'. Towards the top, there is an entry for the 'Adobe Flash Player Plugin'. Just double-clicked it to remove it.