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ERROR: "Internet Explorer encountered problem; needs to close" when running lesson

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How to uninstall Flash Player:  

• Open Control Panel > Add or Remove Programs > select Remove next to Adobe Flash Player  ActiveX.
  
  
• If Flash Player does not appear on the list of programs, go to the Adobe Web site for information on: How to uninstall the Flash Player plug-in and ActiveX control.

How to reinstall Flash Player:

Before you download and install the Flash player, make sure you have administrator privileges on the workstation, which is required in order for the installation to succeed.  You can then download and install the Flash Player from Adobe's web site.  

Note:   As with many installations, this installation process may include options that are selected by default to install additional applications, such as an anti-virus or toolbar program; read each screen and select the options that make sense for you.   It is not required to install these additional applications to run PLATO content.