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Technical Requirements

Java(TM) Runtime Environment

You will need to have the Sun Microsystems Java Runtime Environment (JRE) Version 5.0 or later installed in your browser in order to use some features of this website. This includes all mapping components.

Windows-PC Users

It is important that you run only one Java version.

  • Determine the version of Java installed on your computer:


  • Click 'Start' > Select 'Settings' > Select 'Control Panel' > Select 'Java' or 'Java Plug-in' > Select 'About'

    You need Sun Microsystems Java Runtime Environment (JRE) Version 5.0 or later, installed in your browser in order to use some features of this website (in particluar, the CFEV Site Examination tool). If you do not see Java or Java Plug-in, you do not have Java installed on your PC. You need to install JRE version 5.0 or later on your computer as per the instructions below. If you have JRE version 5.0 or later you have the correct version installed. Otherwise, you need to uninstall any old versions of Java you have installed.

  • Uninstall old versions of Java installed on your computer:


  • Use Add/Remove Programs in the Microsoft Windows Control Panel.

    Click 'Start' > Select 'Settings' > Select 'Control Panel' > Double click the Add/Remove Programs control panel icon. The Add/Remove control panel displays a list of software on your computer. Select J2SE Runtime Environment or Java 2 Runtime Environment, and click the Remove button.

  • Install Sun Microsystems Java Runtime Environment (JRE) Version 5.0 or later on your computer:


  • Download Sun Microsystems Java Runtime Environment (JRE) Version 5.0 or later from www.java.com and follow the intructions given.

Note: Java Runtime Environment (JRE) Version 5.0 is also known as Java Runtime Environment (JRE) Version 1.5.0

Browser Settings

You must ensure that Java is enabled in your browser. For Internet Explorer users,

Click 'Tools' > Select 'Internet Options' > Select 'Advanced' Tab.

You then need to ensure that the 'Java (Sun)' option is ticked. If it is not ticked, you will need to tick it and restart your computer for the change to take effect.

Screen Settings

You will find this site easier to navigate if your screen resolution is set to 1024 x 768 or greater.

Click 'Start' > Select 'Settings' > Select 'Control Panel' > Select 'Display'> Select the 'Settings' Tab and move the Screen Resolution slider towards the right.