If the IE browser window shows a boxed section with a small 'X' icon in the upper left corner, this means the simulation can not load due to the missing Java Runtime Environment (JRE) for IE. If there is any problem with the simulation window, you will need the more current version of the Java Runtime Environment for Windows/OS X. To get the latest version for your hardware, go to java.sun.com/
link to download the Java Runtime Environment (JRE) 8. Look for the initials JRE associated with JDK 8 Update ?? (current version). On the next page loaded, you will have to select a platform from the dropdown menu list and accept the licensing agreement before you can begin the download. Select the Windows Platform then click the Continue button. In the new window select the first option for offline installation of the JRE file(s). This will download to your computer and automatically accessorize IE so it ready open the simulations. Now follow these instructions
to adapt your computer to Java applets.